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 1-1/4 cups graham cracker crumbs on the bottom of a 9-inch 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 1-1/2 hours.