Compliments of the season, FT

I'd like to know what you all think are the best cities in Sub-Saharan Africa for street food. Not necessarily in terms of quality - this is street food - but for variety and presence (that is, stalls can be found throughout the city, not just in a downtown/tourist area).

Based on previous travels, Johannesburg's offerings left much to be desired, Harare had nothing and Addis Ababa had more shoe polish than food.

Thanks for your input, particularly because your responses will help me in planning my next trip.