*Recipe notes; when I looked at recipes for this dish, they were all over the map. Some had garlic, some called for red onion, and a couple even listed vinegar in the ingredients. From what I can tell from the history, in Amatrice no garlic or onion is used, the onion being added later by the Romans. I decided to include the onion, because I'm used to the Roman version. This recipe is how I chose to make my version in the end, and we enjoyed it very much.