Berry Slab Pie

Preparation
Preheat oven to 400 degrees F. Fit pie dough to a jelly roll pan (or sheet pan with lip), then crimp the dough edges as desired.
For the filling: add all berries to a large bowl and combine with sugar, lemon zest, and salt. Add ground tapioca and toss to combine.
For the crumble: in another small bowl, mix together flour, sugar, lemon zest, and salt and mix to combine. Add softened butter and use a fork to combine until crumbles form, don’t overmix.
Transfer fruit filling into the prepared pie dough and spread into an even layer. Sprinkle crumble over top.
Bake for 40-45 minutes or until crust is golden and the filling is bubbling.