Before you begin: be sure your pie crust is chilled (homemade) or thawed (frozen).
½ recipe homemade pie crust1
On a lightly floured baking mat or piece of parchment paper, roll the dough into a 12" circle. Transfer the mat or paper to a baking sheet and chill in the refrigerator until you need it.
BLACKBERRY FILLING
In a medium size bowl, combine the blackberries, sugar, flour, lemon juice, and vanilla extract. Toss everything together until it is well-combined. It's ok if some of the blackberries start to fall apart, but try to be gentle anyway.
Chill the blackberries in the refrigerator until you need them.
WHIPPED FETA
In a food processor or a strong blender, combine the feta, sour cream, honey, olive oil, and vanilla extract.
6 ounces (170g) feta cheese, ½ cup (113g) full fat sour cream2, 2 Tablespoons (42g) honey, 1 Tablespoon (15mL) olive oil3, 1 Tablespoon (15mL) fresh lemon juice
Process the mixture until it is smooth and creamy. If you want it to be more textured, you can stop when it is at the desired consistency. Set aside.
ASSEMBLE & BAKE
Remove the chilled pie dough from the refrigerator.
Use a spoon or spatula to spread the whipped feta onto the prepared pie dough, leaving at least a 2" border around the edge (so aim for making a 9-10" circle of the feta).
Scatter the blackberry filling evenly over the feta, taking care not to keep them in a single layer.
Gently fold the border of the pie dough up and over the feta and blackberries. It will stick to itself and "glue" itself into place, but if you are having trouble with it sticking, you can use a tiny bit of water to make it stick together.
Once the border of the galette is securely in place, chill it in the refrigerator while the oven preheats (next step). You will want it to chill for at least 20 minutes, but it can be chilled for up to 8 hours. If you are chilling it longer than 1 hour, cover it tightly so it doesn't dry out.
Arrange a rack in the middle of the oven, then preheat it to 425°F (218°C).
Bake the galette until the filling is bubbly and the crust is golden brown, about 36-40 minutes. Allow it to cool on the baking sheet for 15 minutes before slicing and serving. Serve with additional honey, ice cream, or homemade whipped cream. Store leftover galette covered tightly in the refrigerator for up to 4 days. Baked galette freezes well, up to 3 months. Thaw in the refrigerator and warm as needed. Unbaked galette freezes well, wrapped tightly, up to 3 months. Thaw in the refrigerator, then bake as directed.
Video
Notes
Pie crust: my pie dough recipe, as written, makes two discs. You can either halve it and use that or save the other disc for another recipe. Frozen store bought pie crust is also fine– you will only need one (a package usually has two). Thaw overnight in refrigerator before use.
Sour cream: you can also use full fat Greek yogurt. I suggest using plain or one that is lightly flavored with honey or vanilla.
Olive oil: you can use another neutral flavored oil if you prefer.
Blackberries: you can use frozen blackberries. Thaw before using.
Make ahead: a thawed pie dough can stay covered tightly in the refrigerator for up to 3 days. I don't recommend leaving a rolled-out dough in the refrigerator longer than about 4 hours. Be sure it is covered tightly so it doesn't try out. Blackberry filling and whipped feta can be left in the refrigerator covered tightly for up to 1 day.
Nutrition Disclosure
All nutritional values are approximate and provided to the reader as a courtesy. Changing ingredients and/or quantities will alter the estimated nutritional calculations.