Potatoes Au Gratin is a rich and creamy French dish consisting of sliced potatoes, cheese, butter, garlic, and cream. This easy and indulgent side dish is made by baking layers of thinly sliced potatoes and onions in a decadent Cheddar cheese sauce until tender and browned. Some variations of the recipe include adding different types of potatoes, such as white and sweet potatoes, and incorporating additional ingredients like caramelized onions and nutmeg. Overall, Potatoes Au Gratin is the ultimate comfort food that is worth the indulgence.