4 1/2 c. sifted flour
3 1/2 tsp. baking powder
8 tbsp. sugar
1/2 tsp. salt
3/4 lb. butter
4 to 5 tbsp. sour cream
4 egg yolks, slightly beaten

FILLING:

8 apples, peeled, sliced
3/4 c. sugar
Several tbsp. water
1/2 tsp. nutmeg
1 tsp. cinnamon
1 tsp. lemon rind
Powdered sugar

To make the crust, combine the flour, baking powder, sugar and salt. Cut in butter. Combine sour cream and egg yolks and add to flour mixture. Knead lightly, form into a ball.

For the filling, cook apples with sugar and water until thickened. Add nutmeg, cinnamon and lemon rind. Cool.

Divide dough into 2 parts and, between 2 pieces of wax paper, roll out a bit thicker than for pie crust. Place 1 part of dough in well greased 8 1/2 x 13 1/2 inch pan. Fill with apple mixture and cover with remaining dough. Seal edges. Brush top with egg whites.

Bake at 375 degrees for 45 minutes or until top is golden. When cool, dust with powdered sugar and cut into squares. Top each square with whipped cream prior to serving, if desired.