1960's Craptastically Good and Ridiculously Easy-to-make Beef Casserole

Recipe courtesy of wrsmyguy

1 lb. ground beef

1 medium onion (diced)

1 can Campbell’s tomato soup (undiluted)

1 can green beans (drained)

Mashed potatoes

½ cup shredded cheddar cheese

Brown the beef and onion. Drain. Add the tomato soup and the green beans and stir. Transfer to a three quart baking dish. Top with the mashed potatoes and cheese. Bake at 350 degrees until bubbly (30 minutes).