Brown 1/2 to 3/4 pound ground beef with 1/2 cup onion; drain and add 1 (8 ounce) can tomato sauce, salt, and pepper; simmer. Press 1 can biscuits in 10 inch greased pie plate. Put mixture on crust. Top with 1 cup grated cheddar cheese. Bake for 25 minutes, let stand 5 minutes before cutting.