1 (10 oz.) pkg. frozen broccoli
1 (10 oz.) pkg. frozen cauliflower
1 (10 oz.) pkg. frozen green beans
2 cans mushroom soup
1 sm. onion
1 1/2 c. American cheese (cubed)

Melt cheese in the soup. Put all of the vegetables into a casserole dish and pour cheese and soup mixture over. Bake at 350 degrees for abut 40 minutes.