Apple Pie Bars

This great recipe can be simplified with using apple pie filling. I used my home canned filling but you can certainly purchase canned filling from the store.
CRUST: 2 c flour
1/2 c sugar
1/2 t baking powder
1/2 t salt
1 c butter
2 egg yolks beaten reserve whites
Combine dry ingredients & cut in butter till crumbly. Mix in yolks, will be crumbly.
Press 1/2 of this mixture into bottom of 9x13 baking pan. Set remaining mixture aside for topping.
FILLING: 4 c apples peeled & sliced
1/2 c sugar
1/4 c flour
1 t cinnamon
1/4 t nutmeg
Mix all & spread over crust. Top with remaining crumbs. Brush with beaten egg whites. Bake at 350• for 40 min. Serve with whipped cream.