Danish pastry Apple bars

Sift together flour and 1 teaspoon salt. Cut in shortening. In measuring cup beat egg yolk, and enough milk to measure 2/3 cup. Mix well. Stir into flour mixture. On floured surface roll half of the dough into 17" x 12" rectangle. Fit into bottom and the sides of a 15.5" x 10.5" x 1" baking pan. Sprinkle with cornflakes, top with Apple slices. Mix granulated sugar and cinnamon. Sprinkle over apples. Roll remaining dough two 15.5" x 10.5" rectangle. Place over apples. Seal edges, cut slices in top. Beat egg white till frothy, brush on top. Bake at 375°F for 50 minutes. While warm, Drizzle with mixture of powdered sugar and 3 to 4 teaspoons of milk. Cool. Cut into bars.