cornstarch, and vanilla bean seeds. then all of that will cook until you have a jelly-like substance. the rest of the blackberries and cherries are folded into the mixture, which will help your pie filling keep its shape when you cut out a slice.
i feel like this pie could be seen as the official pie of the empire because of the death star and all. but i feel like it could also be seen as the official pie of the rebel alliance because you get to dig in and destroy the death star with your fork. so do with that what you will.
may the force be with you today, friends!
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