Yacon is a brown to violet tuber from the Andes which can grow to a weight of up to 1 kg.
From the outside it looks like a radish or sweet potato. It has been regarded as a useful staple food for decades by the natives. The tender tuber flesh is eaten as a vegetable, salad or simple raw. The yacon tuber is similar in taste to a refreshing sweet honey melon or pear.
Yacon is not regarded as a vegetable but - because of its high levels of sugar – as a fruit. The yacon tuber is also regarded as the "diabetic's potato" due to its blood sugar sinking effects.