To cook up a tender piece of lamb or mutton you need to first tenderize and marinade. Depending on what cut you’re using, take the meat and pound it well with a meat tenderizer. This will help break down the meat density, allowing it to cook more evenly and allowing the fats and tendons to break down more.Click to see full answer. Likewise, people ask, is leg of lamb tough?And since leg of lamb is a naturally tender cut of meat, it doesn’t need it. In fact, marinating this cut could actually make it more tough.Beside above, how long does it take to cook a 1.1 kg leg of lamb? Place the lamb in a roasting tin and cover with foil. Place on the middle shelf of the oven. Halfway through cook time remove the foil and return to the oven for the remaining time. Medium: 25 minutes per 500g plus 25 minutes. Likewise, how long should you marinate lamb? Plan on marinating chops and small cuts for about 4 to 5 hours. Large cuts (double recipe) like leg of lamb should be marinated for 8 to 24 hours.Does Lamb get tougher the longer you cook it? Cooking tougher cuts of lamb too quickly Upper center cuts will undoubtedly be much softer and more tender. When you’re cooking tender portions of lamb, you can get away with slightly quicker cooking times at higher temps.