This recipe uses the Ninja Foodi Pressure Cooker & Air Crisper and I think it would be hard to fit a whole duck in the XL Grill, but if you have the deeper 5-in-1 original grill and get a small enough duck, you can do it that way. Since there isn't an easy way to steam the duck in the grill, you can either steam it on the stove or skip that part and lower your heat to around 275°F and air fry it for about 40 minutes. Always check on your food when air frying, adjust the temperature if needed and cook to temp, not time.