This peppery green leaf is used in salads and as a vegetable. It's known as arugula in the US. The leaves have a slightly bitter, peppery flavour and are best gathered when they’re young. Rocket is a rich source of iron as well as vitamins A and C. It makes a delicious addition to salads but can also be used to make soups and rocket pesto. A bed of rocket is a good base for serving grilled poultry or fish.