1 lb. ground beef
1 onion, thinly sliced
8 oz. frozen green beans, cooked slightly
1 (4 oz.) can mushrooms, drained
1 can cream of mushroom soup
Tater tots

Brown beef, drain. Put in casserole dish and layer with onions, beans, mushroom soup and top with tater tots. Bake, uncovered at 350 degrees for 1 hour. Serves 4.