This classic side dish is easily a favorite among many at the Holiday table. This year, take it up a notch with this 'Au Gratin' style recipe which includes roasted sweet potatoes sliced and shingled in a pan before being topped with heavy cream, real maple syrup, pecans, and of course, plenty of marshmallows. Baking this dish in the pellet grill means less time spent in the busy kitchen and more time spent with those you love.