Mom's Tater Tot Casserole

1 1/2 # ground meat

1 can cream of chicken soup

onion, chopped

1 frozen pkg. mixed vegetables

Fry ground beef and onion together, after it is fried add a can of soup. Put in the bottom of 3 1/2 qt. casserole. Next layer, add vegetables, on top of vegetables add the tater tots. Bake at 375° for 1 hr.