Oven (Recommended): Preheat oven to 350°F. Place the aluminum tray on a baking sheet. Remove the foil lid, then place it back loosely over the tray. Heat for 30-35 minutes. Carefully remove the foil lid and continue heating for 5 minutes, or until the top is lightly browned and the mac & cheese is hot throughout.
Microwave: Transfer to a microwave-safe dish. Cover loosely and heat on HIGH for 4–5 minutes, stirring halfway through, until hot throughout.
Storage: Keep refrigerated. Best enjoyed within 3 days.
