Oven-Baked 4-Ingredient Potato Au Gratin Cups

These potato au gratin cups give you everything you love about the classic casserole in a neat, single-serve portion. Thin potato slices bake in seasoned cream until tender, with a crisp, cheesy, golden edge on every cup. The recipe uses just four main ingredients: potatoes, heavy cream, onion, and cheddar. Salt, pepper, and a little…