The Stock and pulled lamb (Day 1) Place the lamb shanks, carrot, onion, celery and peppercorns in a heavy casserole. Add water to come three-quarters up the sides of the shanks. Don’t brown the meat, it’ll catch a tiny bit if gnarl, but when it’s in the pie, you want it soft and silky. Cover and roast in the oven at 130 °C for 6 hours. The meat should fall from the bone and the liquid should have turned into a rich, gelatinous stock. Lift out the shanks, strain the stock, and refrigerate both overnight. Discard the spent vegetables.