PASTRY:

2 c. all-purpose flour, sifted
1/2 tsp. salt
1 c. butter
1/2 c. milk
1 egg yolk, beaten (save white for glaze)

FILLING:

1/4 c. crushed cereal flakes
4 c. sliced apples
1 c. sugar
1 tsp. cinnamon
3 tbsp. flour

GLAZE:

1 egg white, beaten
1 c. confectioners' sugar
1/4 c. milk
1/8 tsp. vanilla

Mix flour and salt, cut in butter as for pie crust. Combine milk and beaten egg yolk, add to flour, blending lightly with a fork. Divide into parts, wrap in wax paper and chill for several hours. Roll 1 piece to fit bottom of a 15"x10" jelly roll pan, shaping slightly up the sides. Sprinkle with crushed cereal flakes, arrange sliced apples over crust, then sprinkle the mixture with sugar, cinnamon and flour. Roll remaining dough to fit top, arrange over filling. Brush with beaten egg white. Bake at 425 degrees for 20 minutes, reduce heat to 350 degrees and bake about 30 minutes more. Cool slightly, then drizzle with mixture of confectioners' sugar, milk and vanilla.