1 1/2 cup all purpose flour
  3/4 cups oats (uncooked)
  1/4 cup brown sugar
  1/8 teaspoon salt
  1 stick of butter

Filling Ingredients:
  8 oz. sour cream
  2/3 cup brown sugar
  1/4 cup flour
  4 egg white lightly beaten
  1 tspn cinnamon
  1/4 tspn nutmeg
  4 cored, peeled and thinly sliced apples

Combine sour cream, brown sugar, flour, eggs, cinnamon and nutmeg and toss it into the apples.

Topping Ingredients:
  1/4 cup oats
  1/4 cup brown sugar
  1/4 cup flour
  1/4 cup butter

Cut the butter into the dry ingredients, combine and bake for 50 to 60 minutes at 375 degrees F and/or until "knife clean"