Brown beef and onion together; drain fat. Layer half of the beef onion mixture in a 7x11 inch baking dish. Cover with Sauerkraut and top with the remaining meat-onion mixture. Put uncooked noodles on the top. Spread soups over the noodles. Bake 30 minutes at 350 degrees. Sprinkle cheese on top and bake 30 minute more.