This is the big issue with &#x27;defining&#x27; pizza and many other Italian dishes - Italians themselves can&#x27;t decide how it should be and love to debate these things over and over (usually while eating food)!<p>Carbonara is another highly debated dish - here in Roma (where it is was supposedly born ~50 years ago) some people insist you only need egg, where as others insist you need egg and cheese (and then there is the debate over what cheese). I&#x27;ve heard some restaurants stopped serving the dish to prevent heated arguments with their customers.<p>Even the word for bags in a supermarket can&#x27;t be agreed on. Here we use &quot;buste&quot;, where as in the north they use &quot;sacchetto&quot;. Our word there means envelope, so obviously you will get a funny look if you ask for three envelopes when paying for your groceries (the joke is on us though, we use that word for envelope too :P).<p>Further reading:<p><a href="http:&#x2F;&#x2F;www.seriouseats.com&#x2F;2016&#x2F;02&#x2F;origins-history-of-roman-pasta-gricia-amatriciana-carbonara.html" rel="nofollow">http:&#x2F;&#x2F;www.seriouseats.com&#x2F;2016&#x2F;02&#x2F;origins-history-of-roman-...</a>