Apple Crumble Bars

4 c. flour
1 1/2 c. sugar
1/2 c. brown sugar
1 1/2 c. butter
5 c. apples, skinned and diced
1/2 t. cinnamon
1/2 t. nutmeg

Preheat the oven to 350'. Mix the diced apples with some lemon juice (about 1/2 lemon). Add in cinnamon and nutmeg. Set aside.
Combine flour and sugars in a bowl. Rub in the butter until the mixture resembles coarse breadcrumbs.
Mix 1 cup of the crumb mixture into the diced apples. This is the filling.
Take half of the remaining crumb mixture and press into the bottom of a 9 x 13 inch pan. Bake for 10 minutes.
Remove the pan from the oven and pour in the apple filling. Top with remaining crumbs.
Bake for 45 minutes. Cool the pan completely to allow the crumble bars to set, before cutting them in to bars. (About an hour.)