Wrap the unbaked lasagna tightly before freezing in a layer of plastic wrap and then a layer of foil to prevent freezer burn, then freeze for up to 3 months. When you are ready to cook, thaw in the refrigerator, and then bake as directed. You may have to add 10 to 15 minutes to the baking time as the lasagna’s cold from the fridge. You can also freeze lasagna after baking it for up to 3 months by freezing the entire lasagna or individual servings. Again, tightly wrap it before freezing.