1Melt shortening in large skillet. Cook and stir meat and onion until meat is brown and onion is tender.
Add water; heat to boiling. Reduce heat; cover and simmer 50 minutes.
2Heat oven to 350. Pour meat mixture into ungreased 13x9 baking dish; arrange potato slices on meat.
Stir together soup, sour cream, milk, salt & pepper; pour over potatoes.
Sprinkle with cheese and cereal.
Bake uncovered 1-1/2 hours or until potatoes and meat are tender.