This recipe is adapted from The Pioneer Woman's scrumptious apple pie recipe with just a few minor tweaks. It combines the comforting apple pie filling with a crunchy crumb topping; kinda like a cross between a pie and a crumble! The pie crust i have used is the exact same one i used in my pecan pie recipe which makes two 9" inch crusts. this recipe needs just one crust, so halve all measurements if you don't want an extra crust. Also, make sure you use Granny Smith apples (or any other firm, crisp apples) otherwise the filling will end up a runny mess!