Can you cook a half defrosted leg of lamb?

Yes, you can cook a half-defrosted leg of lamb, but it's important to ensure it reaches a safe internal temperature throughout. Cooking it from this state may result in uneven cooking, so it's best to cook it at a lower temperature for a longer time to ensure even doneness. Be sure to use a meat thermometer to check that it reaches at least 145°F (63°C) for safe consumption. For best results, fully defrost the lamb in the refrigerator before cooking.