2 cups tart apples, peeled and finely chopped (Granny Smith apples work well.)
3/4 cup sugar
2 Tbsp. flour
1/2 tsp. vanilla
1/8 tsp. salt
1 cup sour cream
1 egg
1 unbaked (9") pie shell
Topping:
1/3 cup sugar
1 tsp. cinnamon
1/3 cup flour
1/4 cup margarine or butter
Mix 3/4 cup sugar and 2 tablespoons flour; add sour cream, egg, vanilla and salt.
Add apples; pour into unbaked pie shell. Bake at 425� F for 20 minutes.
Combine 1/3 cup sugar with 1 teaspoon cinnamon and 1/3 cup flour; cut in butter. Sprinkle over pie and return to oven. Bake another 20 minutes at 325� F