2 1lbhamburger 1medium onion, chopped 4potatoes, cooked and mashed 1cntomato soup 1cnlibby's cut green beans Brown hamburger and onions; drain excess fat. Add 1 can Libby’s green beans (drained) and 1 can tomato soup (no water). Top with puffs of mashed potato and cheese slices. Bake 350 degrees F for 30 minutes or until bubbly.