Anyone who travels to the Mediterranean island of Sardinia has most likely heard of its most famous culinary product: casu marzu. Since 2005, the cheese that contains live insect larvae has been banned from being sold in the European Union – for understandable food hygiene reasons. The ripe pecorino gets its creamy tasty flavour thanks to eggs laid in it by the cheese fly. These hatch into maggots that partially digest the cheese and cause it to ferment. “Do you want to see it?” Desiderio Monni asks suddenly. The casu marzu? Monni nods and smiles conspiratorially. The 36-year-old is a cheese s…