Preheat oven to 400 F. In a large skillet, cook beef until brown. Drain off fat. Stir in tomato sauce; heat through. Transfer to an ungreased 2-quart rectangulaar baking dish. Sprinkle with cheese. Flatten each biscuit with hands; arrange the biscuits on top of cheese. Bake about 15 minutes or until biscuits are golden.