1 prepared pie pastry (such as Pillsbury® Pie Crust)
1 (21 ounce) can apple pie filling
7 ½ ounces part-skim ricotta cheese
1 ½ ounces shredded Cheddar cheese
¼ cup all-purpose flour
3 tablespoons brown sugar
1 teaspoon salt
1 teaspoon ground cinnamon
1 tablespoon butter
Preheat oven to 375 degrees F (190 degrees C).
Roll out pie crust lengthwise to fit into the bottom a 13×9-inch baking dish with a good 1/2-inch of the crust up all sides.
Mix apple pie filling, ricotta cheese, egg, and shredded Cheddar cheese together in a bowl; pour over the pastry and flatten into a smooth layer.
Mix flour, brown sugar, salt, and cinnamon together in a separate bowl. Mash butter into the flour mixture with a fork or pastry cutter until mixture is crumbly. Sprinkle over the apple pie mixture in the pan.
Bake in preheated oven until crust is a good caramel-brown color, 15 to 20 minutes.