IN his latest exhibition, Nigerian artist Olufela Omokeko is exploring the importance of food preservation in a country where food is often spoiled due to a lack of quick access to markets and cold storage. During a recent art exhibition in Iwaya, a slum in the commercial capital Lagos, guests also had the chance to taste Omokeko's puree from dried tomatoes, peppers and local spices as he showcased age-old traditions on how to extend the shelf life of perishable food. Nicknamed "son of a pepper seller," Omokeko grew up seeing women who sell perishables at their homes or at the…