The key to easily freezing this comfort food favorite is to line your baking pan with aluminum foil before preparing the lasagna, making sure the foil extends a few inches over the sides of the pan. Add a little extra sauce so the dish doesn't dry out during the freezing process. Once it's made, let it cool, and then put the pan directly in the freezer. When the lasagna becomes firm, wrap it in the foil and freeze the entire package. It'll keep in the freezer for three months.