tater tot casserole

1½ lb. ground beef
1 small onion chopped
2 cans cream of mushroom soup (or use 1 large family can I buy the walmart brad for about $1)
1 can corn or green beans (also can substitue frozen)
2 cup velveeta cheese cut into small squares
2 lb. bag tater tots


Mix all of the above together and throw a 2lb bag of tater tots on top. Bake at temp on tater tot bag until hot and bubbly.