I first had this dish when Nobu opened in Mayfair. My mate Mark Edwards was experimenting with his new wood-burning oven and brought out this fantastic pointed green cabbage, also known as hispi or sweetheart cabbage. A wood-fired oven is the key to getting this dish perfect, but you’ll get a pretty good result if you cook it on a pizza stone in a red-hot oven. You can use black or white truffles for this depen