Sprinkle a baking sheet with 1 tablespoon cornmeal; set aside.
Combine 1 3/4 cups flour and next 3 ingredients in a large bowl; cut in margarine with a pastry blender until mixture resembles coarse meal. Stir in egg whites and cottage cheese just until flour mixture is moistened.
Sprinkle 1 tablespoon flour onto work surface. Turn dough out onto floured surface, and knead 4 or 5 times. Roll dough to 3/4-inch thickness; cut into rounds with a 2-inch biscuit cutter. Place rounds on prepared baking sheet. Coat tops of rounds lightly with cooking spray; sprinkle with Parmesan cheese. Bake at 450° for 14 minutes or until golden. Serve immediately.