One dish that causes major consternation in Italy is spaghetti alla puttanesca (whore's pasta, or prostitute's pasta as we call it in our house). Clearly, the sauce must have at least some tomatoes, garlic and plenty of it (sliced, never crushed) and olive oil. Definitely some sliced black olives. But does it have anchovies? Yes, in m'humble! Does it have chilli flakes? Yes again! What about capers? Definitely! Dried oregano? A must! But what about Parmesan? Never! Sacrilege!