1 1/2 Lb. Cream Cheese (light is OK)
3 tablespoon Potato flour (or self-rising flour)
1 1/2 Cup Sugar
1 Cup Sour cream
Beat egg whites with 1/2 cup sugar until soft peaks are formed.
Mix all other ingredients in another bowl.
Fold into egg whites.
Pour into a 10" round pan.
Heat oven to 350, place a pan with boiling water on lower rack and the cake pan on the center rack.
Bake for 50 min.
Leave in the oven for 24 hours. NO PEEKING. This will assure that the cake will not 'fall'.