Do Not Thaw
Oven: Preheat oven to 425°F. Place desired number of servings on a foil lined or nonstick baking sheet allowing approximately 2 inches between pieces. Bake for 25-30 minutes.
Microwave: Place 1-2 portions on microwave safe dish. Microwave on high power for approximately 1-3 minutes.
Air Fryer: Preheat air fryer to 300°F. Place desired amount of potatoes au gratins in fry pan basket leaving ½" between au gratins. Cook for 25-30 minutes.