The term 'Andean Root Vegetables' refers to a variety of root vegetables that are native to the Andes Mountains in South America. The most common of these vegetables is the oca, which is also known by its four-letter acronym, OCAS. Oca is a starchy tuber that is often boiled or roasted and can be used as a substitute for potatoes. Other Andean root vegetables include mashua, maca, and ulluco. These vegetables are high in vitamins and minerals and are an important part of the traditional diets of many Andean cultures.