The OCA is a South American tuber, also known as the Oxalis tuberosa. It is a root vegetable native to the Andes Mountains in South America and is an important food source for many people in the region. It has a sweet, nutty flavor and is often boiled or roasted. It can also be used in soups, stews, and salads. The OCA is high in carbohydrates, vitamins, and minerals, making it a nutritious and versatile food.