The straightforward recipe needs just a few ingredients: spaghetti, Marmite/Vegemite, unsalted butter, and freshly grated parmesan cheese. Lawson adds that she ate “shortcut versions of this in Italy” that use “crumbled stock cube, along with some butter, olive oil, chopped rosemary and a little of the pasta cooking water to make a flavoursome sauce for spaghetti.”