Submitted by Ita Orlansky
Preheat oven to 350 degrees Fahrenheit. Line two nine x 13 pans lined with parchment paper.
Combine crumb toppings. Divide the mixture into four. Crumble 1/4 of crumbs into the bottom of each lined nine x 13 pan. Reserve rest of crumbs for topping.
Mix farmer cheese and sour cream. Add orange juice, vanilla sugar, lemon extract, and mix. Add egg YOLKS and flour. Mix.
In a separate bowl, whip egg whites into a snow.
Fold egg white into cheese mixture.
Pour half of the batter into each nine x 13 on top of the crumbs. Sprinkle half of reserved crumbs onto the top of each cheese mixture.
Bake at 350 degrees Fahrenheit for one hour.
Cool and cut into squares before serving.
Freezes well. Can be topped with cherry pie filling.