An Italian cabbage with dark green leaves, with a good strong flavour. Cavolo Nero can be used as a substitute in all recipes that require cabbage but it is particularly good in soups. The classic Tuscan soup, ribolitta, is traditionally left to sit for a day before serving to allow it to thicken and the flavours to develop. Cavolo Nero is delicious simply fried in olive oil with garlic and chillies.