1 (21 ounce) can cherry pie filling 1 ½ cups frozen blueberries 1 egg white 1 teaspoon water 2 teaspoons sugar
Press one pie crust into a 9-inch pie plate. Mix 1/2 cup sugar, cornstarch, and cinnamon in a large bowl. Add cherry pie filling and blueberries. Pour into pie crust.
Bake 45–55 minutes in preheated oven until crust is golden brown. If the crust edges are darkening, foil them. Cool for 2 hours to solidify the filling before serving.