Beat the egg yolk and the cottage cheese together until smooth. Mix in the salt, flour and milk. Fold in the egg whites. Cook in a buttered 7" fry pan, using about 2 tablespoons pancake batter. Turn when bubbles begin to break. Cook other side. Set aside. Cut strawberries in half. Mix cornstarch with the water in a saucepan. Stir in strawberries and cook until mixture is clear, about 5 minutes. Pour strawberry sauce over the pancakes and serve immediately. Serves 4.