Heat oven to 400°F.
Combine all pie filling ingredients in a large bowl and toss to evenly coat apples. Let sit for 20-30 minutes until apples have released some of their juices.
7 cups apples, 2 Tablespoons lemon juice, 1/2 cup granulated sugar, 1/4 cup light brown sugar, 1/4 cup all-purpose flour, 1 teaspoon ground cinnamon, 1/4 teaspoon ground nutmeg
While the apples macerate, combine the crumble topping ingredients in a large bowl and cut the butter in using a pastry cutter until it is just small crumbs. Squeeze a couple of handfuls together to create small clumps of varying sizes.
1 cup all-purpose flour, 1/2 cup light brown sugar, 1/2 cup granulated sugar, 1/4 teaspoon ground cinnamon, 1/2 cup salted butter, Pinch of salt
Roll out pie crust on a lightly floured surfacae and tansfer to a 9-inch pie plate. Trim edges and tuck under, using the tines of a fork to make a decorative pattern around the edge of the crust.
1 unbaked [pie crust]
Mound the apple pie filling in the center of the crust, leaving the liquid behind in the bowl. Transfer the juices from the apples to a microwave-safe bowl and microwave for 45-60 seconds, until thick. Spread over the top of the apple pie filling.
Sprinkle the pie with the crumble topping.
Bake for 50-55 minutes until golden brown on top and the apple filling is bubbling and the apples are tender. Cover the pie crust edges with a pie shield partway through baking and cover the whole pie with a piece of aluminum foil halfway through baking if it looks like it is getting too brown.
Cool completely before serving.