Combine potatoes, bacon, onion, salt and pepper. Mix cheese, mayonnaise and bacon fat together. Stir into potato mixture. Bake uncovered for 1 hour at 300 degrees.
Boil potatoes 5 to 7 ... cheese, onions and mayonnaise into ovensafe bowl, mix well. Sprinkle bacon pieces on top. Bake in ... Great with barbecued food.