Preparation:

Preheat the Oven: Preheat your oven to 350°F (175°C). This temperature is high enough to warm the duck without drying it out.

Remove from packaging: Remove the duck from the packaging and let it sit at room temperature for about 20-30 minutes. This allows the duck to reheat more evenly.

Oven-Safe Dish: Place the duck in an oven-safe dish or tray. If the duck is already cut into pieces, arrange them in a single layer for even heating.

Cover (Optional): To prevent the duck from drying out, you can loosely cover it with aluminum foil. This is especially recommended if the duck has been cut into smaller pieces.

Reheat: Place the duck in the preheated oven. Reheat it for about 15-20 minutes. The exact time may vary depending on the size and thickness of the duck or its pieces.

Check Temperature (Optional): If you have a meat thermometer, you can check the internal temperature of the duck. It should reach around 165°F (74°C) to ensure it's heated through.

Serve: Once reheated, remove the duck from the oven and let it rest for a few minutes before serving. This allows the juices to redistribute, ensuring the meat is moist and flavorful.

Note: Avoid using a microwave to reheat roasted duck, as it can cause the meat to become tough and the skin to lose its crispiness. The oven method ensures that the duck retains its texture and flavor.