Ideal for making a good stew, but it can also be grilled. Certified organic product (CCPAE). Osso buco is a cut of meat that comes from the lower part of the calf or cow's leg. It is a popular cut in Italian cuisine and is traditionally used in dishes like osso buco alla milanese. In terms of its nutritional value, osso buco is a good source of high-quality proteins. It is also rich in vitamins and minerals such as iron, zinc, niacin, vitamin B12, and vitamin B6.