http://wikiless.i2p/wiki/Nigerian_cuisine?lang=en
A particular species of cocoyam is used as a thickener to make the soup thick. This vegetable soup is common among the igbos of eastern Nigeria. 'Ofe' means soup in igbo language and 'Owerri' is the capital city of Imo state in eastern Nigeria. Ofe achara , mostly found in Abia State - Ndiwo, Ngwa, Umuahia, Itumbauzo, it is native to the Igbo people.