How long should you reheat a frozen lasagna?

The time it takes to reheat a frozen lasagna will vary depending on the size and shape of the lasagna, as well as the wattage of your microwave. Here's a general guideline:

For a frozen lasagna weighing about 2 pounds (900 grams):

1. Thaw: Remove the lasagna from the freezer and let it thaw overnight in the refrigerator, or for several hours at room temperature if you are short on time.

2. Preheat: Preheat your oven to 350°F (175°C).

3. Cover: Once the lasagna is thawed, remove the wrapper and cover it with foil or a microwave-safe lid.

4. Microwave: Place the lasagna in the microwave and heat on half power for 10 minutes.

5. Check: Take the lasagna out of the microwave and remove the cover. Check to see if the lasagna is warm all the way through and the cheese is melted. If needed, return to the microwave in 5-minute intervals, checking each time, until completely heated.

6. Finish in Oven: Place the covered lasagna in the preheated oven for 20-25 minutes, or until heated through and the cheese is bubbling.

Remember, always use a food thermometer to make sure the internal temperature of the lasagna has reached 165°F (74°C) before consuming.