Serve with polenta, or my household’s favorite—roasted garlic mashed potatoes—to take in the wonderful sauce. The factor with roasting a leg of lamb is that unless you’ve a meat thermometer, it’s truly quite hard to cook dinner the roast completely so it’s blushing pink on the inside, moist and juicy. It can take just 20 minutes for a leg of lamb to go from excellent to dry. Usually, folks cook dinner lamb by grilling, roasting, and braising. On the opposite hand, mutton is cooked greatest with stewing and different slow-cooking methods. Muttons should be cooked slowly as a result of they’re harder cuts.