1/2 pkg. (8 oz.) reg. size noodles
1 lb. ground beef
1 lg. onion, chopped
8 oz. Velveeta, cubed
1 can tomato soup
1/2 c. sliced mushrooms

Saute onion in pan. Add ground beef and brown. Drain. Cook noodles per package instructions. Drain. Add to meat and onions. Add cheese. Pour into casserole. Top with undiluted tomato soup and mushrooms. Bake 1 hour at 250 degrees with lid.