A meat thermometer should be used to verify that a cut of lamb has reached the appropriate temperature according to the desired doneness. It should be inserted into the thickest portion of the meat. The thermometer should not be placed near a bone or in a fatty area, which will result in a temperature reading that is inaccurate in terms of proper doneness. An ovenproof thermometer can be placed into a lamb roast and remain there throughout the roasting process. Most instant read thermometers are not ovenproof, so they cannot remain in the roast during cooking.
