1 lb. ground beef
1 onion, minced
1 can cream of mushroom soup
1 pkg tater tots (1 to 2 lbs)
1 cup cheddar cheese, shredded

Press ground beef into bottom of casserole dish.  Top with onions. Spread undiluted soup over onions.  Place tater tots atop soup.  Sprinkle with cheese.  Bake 1 hour at 350.