INGREDIENTS
Homemade pie crust (this recipe makes 2 crusts: one for the bottom and one for the top)
7 cups
fresh or frozen raspberries, blueberries and blackberries (about 2 1/3 cups of each type of berry*)
1 cup
granulated sugar (plus a little extra to sprinkle on top of the pie)
1 tbsp
lemon juice
4 tbsp
cornstarch
2 tbsp
butter
1
egg white (beaten with a fork )