The genius hack in this recipe: topping sweet potatoes with marshmallows while they're still piping hot from the slow cooker yields a baked marshmallow topping that's typical with baked sweet potato casseroles.
Place sweet potatoes, brown sugar, butter, vanilla, salt, pepper, cinnamon and nutmeg in a 5- to 6-quart slow cooker. Stir to coat. Cook on High for 3 hours.
Transfer to a serving dish. Top with marshmallows and pecans. (The heat from the sweet potatoes will partially melt the marshmallows.)