Can I Freeze And Reheat Cooked Lasagna. Unless a recipe states otherwise, it’s fine to freeze lasagna you’ve just made. Here's how to do it:

If you want to freeze leftover lasagna after a meal, let it cool down first but be sure to freeze it quickly after it has cooled down, to prevent bacterial growth. Transfer the lasagna from the freezer to the refrigerator the night before you plan to cook it. Cooked lasagna lasts 3 to 5 days in the fridge and up to 3 months in the freezer.