It wouldn't be a potluck if you didn't bring the cheesy potatoes, now would it? These are simple and so tasty. Perfect to mix up in advance and be ready to bake in the oven. Add a little onion or green pepper, if you like.
In a 9x13 baking dish mix together potatoes, sour cream, soup and half the cheese. Mix in melted butter. Top with remaining cheese. Bake at 350 for 30 minutes.
VARIATION: Make it a one dish meal, add cubed ham and peas.