The Spanish call it 'tortilla', the Italians from whom I learned it call it 'sformato' (literally 'deformed'). It's basically a mess of potatoes and onions held together with eggs. But once you try it you'll see that it's oh so much more than that! This is a very versatile dish. Cut it into small squares for appetizers, or in wedges for a main course or a side dish. Serve it hot, room temp, even cold. Cut out the bacon and it's vegetarian; add spinach or pesto for extra color and flavor. Have fun, and buon appetito!