Grease a 12x15 pan.
Unroll one package of crescents rolls and fit into pan to form crust.
Beat together cream cheese, sugar, egg yolk and vanilla. Spread mixture over crust.
Roll out seconds crescent roll package and place on top of cream cheese layer. Beat egg white and brush on top.
Sprinkle with topping and bake at 350 degrees for 30 to 35 minutes.