Step 1

Preheat the oven to 400 degrees F. Line a sheet pan with parchment paper.

Step 2

Mix the blueberries, the 1/2 cup of sugar, the flour, lemon zest, lemon juice, and cassis in a large bowl.

Step 3

Carefully ease one pie crust (recipe linked in the ingredients list)  into a 9-inch pie plate, making sure not to stretch the dough at all, or it will shrink as the pie bakes. With a sharp knife, cut the excess dough off at the edge of the pie plate. Spoon the blueberry mixture into the pie shell, scraping the bowl with a rubber spatula to be sure you have all the juices.

Step 4

Brush the edge of the crust with the egg wash. Carefully lay the second crust on top, again easing — not stretching — it onto the pie. Cut the excess dough off at the edge of the pie plate. Press the two edges together with a dinner fork. Brush the top crust with the eggs wash, cut three slits for steam to escape, and sprinkle with sugar.

Step 5

Place the pie on the prepared sheet pan and bake in the middle of the oven for 45 to 50 minutes, until the filling is very bubbly and the crust is nicely browned. Allow to cool and serve warm or at room temperature.

Step 6

Cut each pie into 8 equal pieces. Serving size: 1 slice.