Lamb liver is not only tender and delicate flavored, but it is full of many important nutrients. Liver is rich in iron and Vitamin A and has an unabashed flavor that nicely complements that of its usual companion, onion. Liver can be cooked with dry heat, say by grilling or sautéing it, but it becomes very tough if it’s cooked beyond medium rare. Since liver has very little fat, you might want to baste it. Cats and Dogs love it too.