Rotten cheese with wriggling live maggots? Sardinia’s beloved casu marzu might be illegal to sell – but tourists are mad for it

Origins series

Adventurous foodies visiting the Italian island love eating casu marzu, paired with the flatbread, pane carasau, and gulped alongside the local red wine Cannonau – but the dubious legal status of eating insect-infested, decomposing pecorino makes it tricky to find