Reduce heat, add remaining ingredients and simmer for an hour or more, until soup is somewhat thickened. Stir from time to time. If there is too much palm oil on the surface for your liking ...
Aprapransa (fried corn flour mixed with palm-nut soup, and groundnut paste) is also cherished very much by the Asante people. Others are akaton (boiled cocoyam with hot pepper), Mpoto mpoto ...