01 -
Set oven to 200°C. Prepare a large, ovenproof casserole dish with lid.
02 -
Arrange the peeled potato pieces, chopped onion, and lemon peel at the base of the casserole. Season with salt, pepper, 1 tablespoon oregano, and 2 tablespoons olive oil. Scatter rosemary sprigs and halved garlic over the vegetables.
03 -
Rub the leg of lamb with the remaining 1 tablespoon olive oil, season generously with salt, pepper, and 1 tablespoon oregano.
04 -
Place the seasoned lamb on top of the vegetables. Pour the white wine and stock around the lamb into the dish.
05 -
Cover the dish with a lid and roast in the oven for 30 minutes at 200°C.
06 -
Reduce oven temperature to 160°C and continue roasting, covered, for 3–4 hours until the lamb is very tender.
07 -
Remove the lid, increase oven temperature back to 200°C, and roast lamb uncovered for 1 hour until deeply golden.
08 -
Remove the lamb from the oven, transfer to a board, and cover loosely with foil. Allow to rest for at least 10 minutes, up to 30 minutes.
09 -
Pour out the cooking juices from the dish into a jug. Return the potatoes to the oven and roast uncovered for a further 15–20 minutes until crisp and golden.
10 -
Carve or shred the rested lamb. Serve with the crispy potatoes and a drizzle of reserved pan juices.