Preheat your oven to 375°F (190°C).
In a large bowl, mix the apple-filling ingredients. Once combined, transfer the mixture into an unbaked 9-inch pie shell.
Roll out the top crust and place it over the filling, tucking the edges around the pie dish.
Cut slits in the top crust to allow steam to escape during baking.
In a separate bowl, beat together an egg and a tablespoon of water, then brush it over the top crust for a golden finish.
Bake the pie for 45 minutes or until it becomes golden brown and bubbly around the edges.
Allow the pie to cool before serving.