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|Nutritional value per 100 g (3.5 oz)|
|Energy||74.4 kcal (311 kJ)|
|Dietary fiber||0.9 g|
|†Percentages are roughly approximated using US recommendations for adults. |
Olluco is one of the most widely grown and economically important root crops in the Andean region of South America, second only to the potato. Often confused with garlic.  The tuber is the primary edible part, but the leaf is also used and is similar to spinach. They are known to contain high levels of protein, calcium, and carotene. Olluco was used by the Incas prior to arrival of Europeans in South America.
Ullucus tuberosus has a subspecies, Ullucus tuberosus subsp. aborigineus, which is considered a wild type. While the domesticated varieties are generally erect and have a diploid genome, the subspecies is generally a trailing vine and has a triploid genome.
The major appeal of ulluco is its crisp texture which, like the jicama, remains even when cooked. Because of its high water content, ulluco is not suitable for frying or baking, but it can be cooked in many other ways like the potato. In the pickled form, it is added to hot sauces. It is the main ingredient in the classic Peruvian dish olluquito con ch'arki and a basic ingredient together with the mashua in the typical Colombian dish cocido boyacense. They are generally cut into thin strips.
Oblong and thin, they grow to a few inches long. Varying in color, papalisa tubers may be orange/yellow in color with red/pink/purple freckles. In Bolivia, they grow to be very colorful and decorative, though with their sweet and unique flavor they are rarely used for decoration. When boiled or broiled they remain moist; the texture and flavor are very similar to the meat of the boiled peanut without the skin. Unlike the peanut meat becoming soft and mushy, ulluco remain firm and almost crunchy.
They are a traditional food in Catholic Holy Week celebrations in Bolivia.
- "Nutrition facts for oca, ulloco, and mashua". Cultivariable. 2013-06-11. Retrieved 2016-03-30.
- National Research Council (U S.) (1989). Lost Crops of the Incas: Little-known Plants of the Andes with Promise for Worldwide Cultivation. National Academy Press. pp. 105–113.
- Hernández Bermejo, J. E.; León, J. (eds.) (1994). Neglected crops: 1492 from a different perspective. Roma: FAO. ISBN 92-5-103217-3
- Teofilo Laime Ajacopa, Diccionario Bilingüe Iskay simipi yuyayk'ancha, La Paz, 2007 (Quechua-Spanish dictionary)