Yes! Before and after cooking lasagna may be frozen. It's fine regardless! Here are some tips: Make use of an aluminum pan that can be used in order to prepare your lasagna. Wrap your lasagna with plastic wrap before you then freeze it. When you cook the lasagna ahead of freezing it, ensure that the lasagna is allowed to chill before wrapping it. The lasagna is covered twice by wrapping it in plastic wrap and then more in foil. Take it out of the freezer the day before you plan to prepare it. This will let it bake more quickly at the time baking. Freeze up to 2 months.