How To Reheat Frozen Factor Meals. Now you’ve frozen your delicious lasagna, let’s talk about the cooking time when reheating it later. Heat the skillet over medium heat.
You’ll need from 5 to 7 minutes, and you also need to keep a close watch on the temperature inside your oven. This process allows food to last longer without the use of preservatives. If you want to reheat frozen croissants, however, the time needed will be a bit longer:
