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Cheesy Vegetable Quiche with Cauliflower Crust

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A cheesy quiche loaded with veggies, baked in a low-carb, gluten free, and deliciously seasoned cauliflower crust.

aerial photo of cheesy vegetable quiche with cauliflower crust in a pie plate with a slice cut out

Many years ago, I was dying to try out this cauliflower pizza crust I had seen all over the place.

Being a baker, my brain constantly thinks in recipes– my bookmarks, notes in my phone, and scribbles in the margins of my planner are filled to the brim with recipe titles and ideas (real life Pinterest, over here).

slice of cheesy vegetable quiche with cauliflower crust sitting on a plate

My brain is also constantly thinking in indoor cycling songs and workout playlists, but that’s a completely different problem I have.

While pizza toppings never quite made it onto my cauliflower pizza crust, turning that crust into the bottom layer of a quiche turned out to be one of the best blogging decisions I ever made.

cheesy vegetable quiche with cauliflower crust in a pie plate

In fact, just 2 months after I originally published this post, Huffington Post picked it up and plopped it into a roundup of recipes using cauliflower in unconventional ways.

Needless to say, this post has gotten so much traffic over the years from that post, so, in turn, it has received some pretty great reviews from folks who have made it.

I thought that six years later was a good time to finally update the post with fresh photos and an updated, clearer set of instructions.

The same great recipe, just easier to understand!

slice of cheesy vegetable quiche with cauliflower crust sitting on a plate

I have written before that I adore savory breakfast.

Give me sausage, egg, and cheese on a biscuit or an everything bagel, you can keep your pastries and French toast (except these sourdough cinnamon rolls can stay… Mmmkay?).

If you aren’t interested in the cauliflower crust, you may certainly bake this in a store bought pie crust, my favorite homemade pie crust, or go with one of my tried and true methods and leave it crustless.

sliced cheesy vegetable quiche with cauliflower crust in a pie plate

Just skip the part about the crust and head over to the guts and glory, but if I were you, I would give this a try.

It really surprised me, not only that it was fairly easy to make, but that it gave a really good flavor and texture to the quiche overall.

WHAT YOU NEED FOR A GREAT CAULIFLOWER CRUST

All you need for the crust is
•a large head of cauliflower
•some grated Parmesan
•an egg
•and some spices

Good news– you need all of that (minus the cauliflower) for the quiche, so you might as well go all out and try something new.

head of cauliflower

You’re going to cut up your cauliflower, removing all of the stems and working with just the florets, and pulse all of it in your food processor (this is the food processor we own and love) until it resembles cornmeal.

After processing, you should have about 2 cups of “cauli-flour” (I crack myself up).

Throw this mixture into a microwave safe container, and cook it in the microwave for 5 minutes (no need to add water).

After it’s done cooking, try to get over the fact that it smells like you-know-what, and let it cool for at least 10 minutes.

riced cauliflower in a food processor

Trust me, you don’t want to leave this part out, because the next step involves squeezing out all of the excess water, and you don’t want hot lava pouring down your hands and arms (not that I know this from experience, I am super patient and always wait the entire 10 minutes before I start squeezing…).

While you’re waiting for the cauliflower to cool, blend your cheese, egg, and spices, and maybe start chopping up the vegetables for the quiche filling.

SQUEEZE OUT ALL THE MOISTURE

Once your cauliflower is cool, ball it up in a strong kitchen towel and squeeze like you’ve never squeezed before. There will be a ton of water in that bad boy… Seriously, a ton.

black kitchen towel being used to squeeze moisture out of cooked cauliflower

And when you think you’re finally done squeezing, squeeze some more, because you’re not. You want absolutely zero liquid left in your cauliflower crust.

Once it’s all dried up, throw it in with your egg mixture and get your hands in there (or a spatula) to mix it all together. From there, you can sort of flatten it and put it right into your pie dish, spreading it out evenly like you would a pie crust.

hands pressing a cauliflower crust into a pie plate

Once it’s all in, bake it for about 15-20 minutes, or until the edges brown and the overall color is browning as well.

While my crust baked, I started to sauté my vegetables (seasoned with a pinch of salt and pepper).

ALL THE VEGGIES!

For this recipe, I used frozen chopped spinach. I went this route because
1) it’s easier than sweating down a bunch of spinach
2) it’s already chopped and
3) it comes in a 10oz block which was the perfect amount I needed for my quiche.

No measuring!

slice of cheesy vegetable quiche with cauliflower crust sitting on a plate

Just make sure that once your spinach is defrosted, you squeeze out the water just like you did with your cauliflower (again, make sure it’s cool enough for you to do so if you thawed it in the microwave).

bowl of greens with chopped peppers and onions in a bowl ready to be the filling of a quiche

After all of the vegetables are cooked, it’s time to whip up the simple spinach and vegetable mixture, layer it in the bottom of the baked cauliflower pie crust, and sprinkle the cheese right on top of that layer.

For my cheese, I like to shred my own off the block and use a creamy blend of sharp cheddar and Monterey Jack.

The eggs, milk, salt, and pepper get whisked together in a bowl and then evenly poured on top of the cheese mixture.

pouring egg mixture onto quiche filling in a pie plate

Although we typically dig right in once it’s finished baking, we find the best taste to be after it has settled a bit in the fridge. The flavors marinate together better and, surprisingly, the crust gets crustier.

PERFECT FOR ANY MEAL

This quiche is the perfect breakfast, although if we’re being honest, we have had it for lunch AND dinner. So it never lasts long in our house!

The quiche itself is perfectly cheesy, speckled with sweet vegetables, and blends nicely with the boldly seasoned cauliflower crust (which taste-testers can usually tell is different, but aren’t exactly sure in what way, and still delicious).

aerial photo of cheesy vegetable quiche with cauliflower crust in a pie plate

Change up your vegetables, play around with your cheeses, but certainly do not be intimidated by this “crust.” It might surprise you and your next breakfast guests!

If you’re interested in any other recipes that would go nicely with this low carb crust for quiche, check out any of the following quiche recipes on my blog:
crustless mushroom & tarragon quiche
asparagus quiche
crustless caprese quiche

BONUS: this is actually a keto cauliflower pie crust, so if you’re looking for one of those, BINGO!

slice of cheesy vegetable quiche with cauliflower crust sitting on a plate

Plus, it’s lasted the test of time here at FAF. And I don’t think it’s going anywhere any time soon!

Want to continue getting your veggie fix? Try my veggie nuggets (perfect for kids) or zesty cucumber salad next.

sliced cheesy vegetable quiche with cauliflower crust in a pie plate
4.92 from 12 votes
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Cheesy Vegetable Quiche with Cauliflower Crust

A cheesy quiche loaded with veggies, baked in a low-carb, gluten free, and deliciously seasoned cauliflower crust.
Prep Time1 hr
Bake Time40 mins
Total Time1 hr 40 mins
Recipe Author Lynn April
Servings: 8 slices

Ingredients

CAULIFLOWER CRUST

  • 1 medium head of cauliflower
  • ½ cup (45g) grated Parmesan cheese
  • 1 large egg
  • ½ teaspoon dried oregano
  • ¼ teaspoon garlic powder
  • ¼ teaspoon salt
  • ¼ teaspoon black pepper

FILLING

  • 1 10-ounce package (283g) frozen chopped spinach thawed and drained
  • 1 large bell pepper chopped
  • ½ of a yellow onion chopped; about ⅓ cup
  • 2 cloves garlic chopped
  • 4 large eggs
  • 2 large egg whites
  • 1 cup (240g) milk any
  • ½ teaspoon salt
  • ¼ teaspoon black pepper
  • 4 ounces (114g) shredded cheese

Instructions

CAULIFLOWER CRUST

  • Preheat the oven to 450ºF (232ºC). Spray an 8″ or 9″ pie dish with non-stick spray and set aside. 
  • Cut cauliflower into pieces, removing as much stem as possible and keeping the florets. Rinse the florets in a colander, place in a food processor, and pulse florets until they resemble corn meal. 
  • Place processed cauliflower in a medium size microwave safe bowl and cook in the microwave on high for 5 minutes. Remove from microwave, set aside, and allow to cool for 10 minutes.
  • After cauliflower has cooled, use a strong kitchen towel to wring out all of the moisture. I will sometimes use two different towels separately to get out as much moisture as possible. Transfer dry cauliflower back to bowl.
  • In a small bowl, blend together Parmesan cheese, egg, and spices. Add to cooled cauliflower and mix together with a spatula or your hands.
  • Transfer cauliflower to pie dish, smoothing it out with your hands, making sure to spread it evenly to cover the bottom and the sides of the dish.
  • Bake crust for 15-20 minutes until edges are brown and overall crust starts browning. Allow to cool on wire rack while you prepare the filling.

FILLING

  • Decrease the oven to 350ºF (177ºC). Blot or squeeze out as much moisture as you can from your thawed spinach. If you heated your spinach to thaw it, make sure it is cool enough to handle. Put dry spinach in a large bowl and set aside.
  • Spray a large skillet with non-stick spray and heat over medium-high heat. Add bell pepper, onion, and garlic and season with a pinch of salt and black pepper. Cook mixture for 5-6 minutes, stirring frequently, or until tender. Spoon the cooked vegetables into the bowl with the spinach. Stir to combine and allow to cool.
  • In a medium size bowl, preferably with a spout, whisk the eggs, egg whites, milk, salt, and pepper until thoroughly combined. Set aside. 
  • Spoon spinach and vegetable mixture into cauliflower crust, top with shredded cheese, and pour the egg mixture evenly on top of cheese layer. Place a pie shield or foil around the exposed crust to prevent from burning.
  • Bake quiche for 40-42 minutes or until filling is set. Cool for 10 minutes on a wire rack before serving. Cover tightly and store in the refrigerator up to 4 days, or in the freezer up to 2 months. Thaw in refrigerator overnight and bake at 350°F (177ºC) until warmed through, about 25 minutes.

Notes

You may certainly leave this quiche crustless or consider making your own traditional crust!
Did you make this recipe?Mention @freshaprilflours on Instagram or tag #freshaprilflours!

Love quiche? Try my Crustless Caprese Quiche next!

Crustless Caprese Quiche: A crustless, low-carb quiche bursting with flavorful basil, creamy mozzarella, and juicy tomatoes.

Need some sweet go to with your savory? Try Cinnamon Chip Scones with your quiche!

Cinnamon Crunch Scones: buttery, tender, and full of sweet cinnamon flavor.

Or maybe you want a sweet yet still healthy addition to your breakfast…

Banana Peanut Butter Breakfast Smoothie

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Hi Lynn! I stumbled across your blog on Sally’s Baking Addiction! Nice to meet a fellow fan.
I love the idea of cauliflower crust for a quiche. I have a gluten allergy and this seems like a great alternative to a heavy almond flour (which must be said has to be done now and then) crust and more of an everyday meal. Can’t wait to try it out 🙂 Thanks for sharing.

Hi Amy, thanks for stopping by! Nice to find a fellow fan! I hope you’ll give the crust a try, because it really is fabulous. We have experimented with some things in the GF world, and this has been one of my favs!

That’s so awesome, cant wait it try it!

5 stars
This was delicious. I used unsweetened almond milk (but real cheese) and it turned out great. 🙂

4 stars
Was shocked when I realized the recipe included skim milk as an ingredient! Very unhealthy! Was encouraged when i read that you substituted unsweetened almond milk as a replacement. You had a positive outcome with the recipe so I think I will attempt to prepare the quiche. Thank you for your comment!

Hi Lynn, this sounds great! I don’t have a microwave though so are you able to give an alternative to this stage? Thanks in advance!

Thanks so much! I’ll give it a go 🙂

I don’t have a microwave either and was about to ask the same question. Did you try this with the suggestion to steam? Did it work?

5 stars
Wonderful! I made this last night but used fresh kale rather than spinach, since I had it in the fridge. It was so good. I like that I can freeze it and save some for another time, too!

5 stars
Holy moly is this delicious!!!

This looks so good! I’m carefully counting carbs (new at this) and would so appreciate knowing the nutritional content of this quiche! Thanks!

Thank you, Lynn!!

5 stars
This was UH….MAZING!!! Do you happen to have the nutrition info?

Sounds delish! Can’t wait to bake one. Does it freeze well?

What if you don’t have a microwave?
(I’m not a weirdo, we just don’t have one! Small apartment)
How do you cook the cauliflower w/o a microwave?

5 stars
Hi Lynn making this for the second time,I am taking it to a party and I know it will be a huge hit. Have you tried or do you have a recipe for the cauliflower enchiladas
,I have lost mine. thanks for taking the time to keep us healthy.

An easy way to get bone dry “cauli-flour”, is to use a juicer. Put florets in and it will extract the juice, which I dump, and then just use the perfectly dry, super-fine pulp. It saves all the time of cooking, cooling, and hand squeezing.

Hi I made the Cheesy quiche and use broccoli instead of spinach with the cauliflower crust and was just wanting to know the nutritional value per slice.

Can this be made WITHOUT the cauliflower crust? Sorry, but the crust seems a lot of extra work. I’d love to try this since we’re on the Keto menu, I realize that we can have cauliflower on the Keto menu, but I’m thinking of a quicker time in the making.

Any alternatives for parmesan cheese? I’m on a diet.

5 stars
That’s a duck? Looks like a chick to me. Oh well, due for my annual eye exam. Back on topic, great meal, easier than I had anticipated.

5 stars
Thank you for the inspiration! I had broccoli and cabbage in the fridge that I wanted to use up but no spinach. Food processed them, put them in raw with sautéed onions and it came out fantastic! Also used an alpine cheese instead because that’s what I had. Yum!

Can you use frozen cauliflower for the crust?

5 stars
Delicious. I used asparagus, because that’s what I had. Also used WF frozen riced cauliflower.

What can be substituted for the cheese?