This Au Gratin Potato Bake is a classic and comforting side dish that is perfect for any occasion. Layers of thinly sliced potatoes are smothered in a creamy and cheesy sauce, then baked to perfection. The result is a dish that is rich, flavorful, and satisfying. Serve it alongside roasted meats or as a main course with a side salad for a delicious and filling meal.