CRUST:

2 c. flour
1/2 c. sugar (optional)
1/2 tsp. baking powder
1/2 tsp. salt
1 c. butter
2 egg yolks, beaten

Combine flour, sugar, baking powder and salt together. Cut in butter as for a pie crust. Mix in egg yolks. Press half of mixture in bottom of 15 x 10 inch jelly roll pan or 13 x 9 x 2 inch pan. Set remaining half of mixture aside. Combine all of filling ingredients except egg whites. Arrange over bottom crust. Crumble remaining crust mixture over filling. Brush egg whites over all. Bake at 350 degrees for 30 minutes for jelly roll pan or 40 minutes for 13 x 9 x 2 inch pan. Cool. Drizzle with thin confectioners sugar glaze, if desired. Makes 3 to 4 dozen bars.

FILLING:

4 c. apples, sliced
1/2 c. sugar
1/4 c. flour
1 tsp. cinnamon
3/4 tsp. nutmeg
2 egg whites, slightly beaten