Fried yams
A famous Nigerian street food combination is fried yam (dundun) with ata dindin. Fried Yam (Dundun) is exactly what the name implies: Fried Yam, whereas Ata dindin is the Yoruba language equivalent of Fried Stew. Fried Yam is quite excellent and is regularly served alongside Fried Plantain on the streets, especially at night (Dodo).
Fried Yam (Dundun) can be prepared in two ways: first, by frying chunks of raw yam in vegetable oil, and second, by parboiling the yam first before deep frying. Both ways are common, however some people prefer parboiling since they find it difficult to get the right consistency when frying raw yam. Frying the yam without water almost always results in the yam not being adequately cooked on the interior while being crisp on the surface.
Another explanation is when the yam is fried on high heat. Cooked yam (Dundun) should be fried over a low to medium heat to allow the yam to cook correctly on the inside as well as the outside.