1 1/2 lbs. ground beef
1 med. onion
1 can French green beans, drained
1 c. sour cream
1 can mushroom soup
1/2 lb. sharp grated cheese

Saute beef and onions. Drain. Layer in casserole dish, beef, green beans, soup mixture (soup and sour cream); cover with tater tots. Sprinkle with cheese. Bake at 350 degrees for 30 minutes.