Tator Tot Casserole

This is one of those meals I'd call comfort food. I got it from my mother-in-law. It's easy and delicious. I made some the other night, and scooped some out to take a picture of, then changed my mind. It isn't the most photogenic food I've ever seen but it sure is yummy!
**
Tator Tot Casserole
**
1 lb. ground beef
1 small onion, chopped
1 bag (2 lbs.) frozen tator tots
3 cans cream of mushroom soup
salt and pepper, to taste
shredded cheese
**
Cook beef with onion. Add soup and salt/pepper and mix. Spray 9x13, and layer tots on bottom. Cover with beef/soup mixture. Top with cheese. Cover with foil and bake on 350 for 1 hour.