This is the good version. With canned soup.
Brown Ground beef. Add onion, chopped. Stir in one can cream mushroom soup. Add 1/2 can milk and 1 can whole kernel corn. Put in casserole dish. Boil and mash those potatoes. Cover with mounds of mashed potatoes. Bake at 350 for 20 mins. Top with cheddar, return to oven for 10 more mins.