Preheat oven to 350ºF. Combine all the dry ingredients into a bowl and whisk. Add the oil, egg, and vanilla. Mix to combine. The dough will be thick and stiff – you can squeeze it together with your hands to bring it all together.

Roll the dough out between two pieces of parchment paper until the dough is ¼ inch thick. Mix the berries with 3/4 tablespoon of preserve until they are coated. Place berries in the middle of the dough and use the parchment to fold the edges of the dough over the berries. Paint the top of the dough with the remaining 1/4 tablespoon of preserves. It's okay if some berries are peeking out. Bake for 30 to 35 minutes, or until golden brown.