Cheesy, rich, crispy, and creamy, these potatoes have it all. If leftovers are something you want, don't make these - no matter how big the pan, they always seem to disappear.Tip: Because of variation in the shape of potatoes, the amount of potato that will fit into a single casserole dish varies. Longer, thinner potatoes will fill a dish more than shorter, rounder potatoes will. When purchasing potatoes, buy a few extra in order to fill the dish if necessary. Depending on exact shape and size of potatoes and casserole dish, you may not need all of the cream mixture.