Step 1

Put the lemon zest, anchovies, rosemary and the oil in a food processor, then blend to a rough paste. Put the lamb in a large food bag or bowl, then pour over the marinade, massaging it into the meat. Marinate in the fridge for at least 1 hr, preferably overnight.

Step 2

Heat the barbecue, then cook the lamb for 4-5 mins each side (depending on the thickness of the lamb and how you like it cooked) until nicely browned on the outside. Transfer to a board, cover with foil and leave to rest for 10 mins. Serve sprinkled with rosemary sprigs, and lemon wedges for squeezing over.