Yes, you can use frozen berries! The filling uses lemon juice and brown sugar to enhance the flavors of the blueberries, so the taste of summer can be enjoyed all year long.
Prepare the pie dough and refrigerate for at least 60 minutes.
Press half the pie dough into a pan and fill with weights. Bake at 400°F for 15 minutes. Remove the weights and bake for another 5-10 minutes. Reduce oven to 375°F.
In a large bowl, stir together blueberries, lemon juice and zest, brown sugar, and cornstarch.
Pour the filling into the par-baked crust.
Brush the pie with a lightly beaten egg.
Bake at 375°F for 50-60 minutes, or until crust is golden and the pie is bubbling at the edges.
Let the pie cool, then cut into slices and enjoy!
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