1 lb. ground beef
1 (8 oz.) can tomato sauce
1/3 c. chopped onion
1 can Del Monte seasoned green beans, drained
2 c. mashed potatoes (fresh or instant)
1 c. grated Cheddar cheese

Brown ground beef and onion in medium skillet. Drain. Add tomato sauce. Simmer 5 minutes. Pour into 2 quart casserole.