Irio [eer-ee-o], noun: In the Kenyan tribal language of Kikuyu, irio just means food. But it usually refers to a simple, plain dish of mashed potatoes, maize, and peas or greens. A couple years ago I spent a week in Kenya, in the highlands of the Rift Valley about an hour away from Nairobi. I really enjoyed the good food of this agricultural region. Here's a very typical dinner dish: bright green irio!