When I make lasagna, I try to make two or three of them. We eat one right away and freeze the others. I also make plenty of extra tomato sauce, and I freeze a bag of sauce with each lasagna.
When it comes time to cook the lasagna, I warm up the extra sauce with it. At serving time I spoon some sauce into the bottom of the plate before I put the lasagna on top. It gives it some extra zing, which is nice if you like your lasagna very saucy (like I do).
This roasted vegetable lasagna was made about a month ago, but cooked last night. As you can see, it freezes well. And (if I do say so) it tasted great – especially with all that extra sauce!