Move over mashed potatoes, the best holiday potato side dish is here. These classic Au Gratin Potatoes are creamy, cheesy, and baked to perfection on the Pit Boss. Layers of thinly sliced potatoes, cream sauce, and cheese are piled high for the ultimate addition to your holiday meal. While it may look and taste like this dish took some effort, your guests will never know it took no time to throw together.