4 to 6
Easy
30 minutes
41⁄2 hoursPreheat the oven to 150°C.
Heat the oil in a large pan over a high heat.
Pat dry the meat using kitchen paper and season well. Brown until golden on all sides.
Transfer the lamb to a roasting pan, add the remaining ingredients and cover tightly with tinfoil. Roast for 3 hours.
While the meat is roasting, place all the pesto ingredients into a food processor and blend until smooth. Transfer to a bowl and chill.
After 3 hours of roasting, remove the tinfoil and roast the lamb for a further hour, or until tender.
Transfer the lamb and pan juices to a serving platter and serve with the pesto.
Basil is a surprising knockout with lamb, especially when pistachios and Parmigiano are also involved.
