We always have this the day after we have a spiral ham. I love it!
Potatoes (I prefer Red or Yukon Gold)
Cream of Mushroom Soup
Cheddar Cheese, shredded
Grease a baking dish. Slice the potatoes and layer them in the bottom. Put a layer of ham over the potatoes. Mix the soup, about 1/2 cup of milk, and some cheddar cheese in a bowl. Spread about half of it over the ham. Layer the potatoes and ham again. Spread the rest of the soup mixture on top. Cook at about 375 degrees. The time varies depending on how thick you cut the potatoes, it usually takes at least 45 minutes though. Test the potatoes, when they are soft, it's done!