There are various ingredients you should be using in your lasagna, but one that probably isn't on your shopping list is potato. Once upon a time, though, lasagna creations featuring potatoes as the star ingredient were common — though the dish has now become obscure. Today, we know the rich Italian dish that is lasagna as a layered concoction, generally featuring sheets of pasta, ground meat, zesty tomato sauce, creamy dairy elements, and plenty of melty cheese.