Mix cottage cheese, vanilla, and sour cream. Separate eggs. Add yolks, first measure of fructose, and flour and mix until smooth. In a separate bowl, beat egg whites, second measure of fructose, and cream of tartar together until stiff. Fold this into the first mixture very lightly with a spatula. If desired, chocolate chips can be added at this time.

Smooth 1- quarter cups graham cracker crumbs on the bottom of a 23 cm diameter pan for each pie to be made. Add cake mixture to each pan to a depth of about three inches. Bake in 250 degree oven for 1- half hours.