Line the bottom of a 9-inch pie pan with pie dough. Place the pan in the freezer while you prepare the filling.
1 Double Crust Pie Dough
To make the filling, mix the blueberries, brown sugar, cornstarch, lemon zest and lemon juice together in a large mixing bowl. Stir until well combined.
6 Cups Fresh Blueberries, ½ Cup Light Brown Sugar, 7 Tablespoon Cornstarch, 1 Lemon
Add the filling to the pie crust. Leave any juices in the bowl.
Use the second half of your pie dough to make a top crust. You can either do a lattice as I have done or use a solid crust. If you use a solid top, be sure to cut a few vent holes in the center.
Combine the egg, water and pinch of salt in a small bowl. Beat well. Brush the egg wash over the crust.
1 Egg, 1 Tablespoon Water, pinch Salt
Place the pie on a baking sheet (to avoid any oven messes) and bake on the bottom rack of the preheated oven for 1 hour. The juices should be very bubbly and the crust golden brown.
Notes
Throughout the process, you want the pie dough to stay as cold as possible as this ensures a flaky crust.
When adding the blueberry filling to the pie crust, avoid adding too much of the liquid as this can make the pie soggy.
Let the pie cool fully before slicing.
This pie can be kept at room temperature for 1 - 2 days. For longer storage, cover and refrigerate the pie. If refrigerated, the blueberry pie will keep for 5 - 7 days.