The best method for reheating a large portion of lasagna is putting it in the oven. To ensure it stays moist, add 1/4 cup water to the dish, and cover it with aluminum foil. Reheat at 425 degrees Fahrenheit for 25 minutes. Sprinkle shredded cheese on the lasagna before reheating if desired.
- Set the oven temperature and add water
Set the oven's temperature to 425 F, and wait for the oven to preheat. Meanwhile, put the lasagna in an oven-safe dish, and pour 1/4 cup water around the edges of the lasagna.
- Cover the lasagna
Sprinkle cheese on top of the lasagna, and add extra marinara sauce if desired. Cover the lasagna with aluminum foil.
- Reheat in the oven
Carefully put the lasagna in the oven, and set the timer for 25 minutes. When the timer goes off, remove the lasagna from the oven, and let it stand for five minutes before serving.