Crown roast of lamb
Preheat the oven to 180°C/350°F/Gas mark 4.
To make the stuffing, sweat the onion and garlic gently in the butter until tender but without browning. Mix with all the remaining ingredients except the lamb, adding just enough of the egg to bind. Fill the centre of the crown with the stuffing, then cover the stuffing with a piece of foil.
Roast the crown for about 1 hour, removing the foil after 40 minutes. Baste the joint from time to time as it cooks, then allow to rest for 10 minutes before serving.