Interestingly the persons selling this corrected me when I said Ewe and they said Eva language.
This food is maybe made from wheat flour, however I have never seen wheat in Togo, maybe of corn or millet, hard to know. This food is more or less flours with water made into patties and baked, I think they add some licorice flavor or something, just a tinge. This is hard and stays fresh or ok to eat for days in these containers.
Lots of calories for a few cents.
Collecting information on language, culture, foods is like chasing rainbows, just when you think you are close it is further away. I read information written with too much force or authority, I do not want to portray confidence in this information. I am often very confused and it can take years to unravel the truth.
Who to trust, the educated people try to hide information and the one with no education cannot read or write. These simple street foods are often ignored as low class foods and not worthy to mention. This is a common food, easy to buy in Lome, Togo as you would walk around in neighborhoods, however, I do not see many Yebo walking around in neighborhoods.
In the USA or Indiana we say supper, this is a word in Indiana, a person teaching English should not avoid the real word, or the person traveling to Indiana will be surprised.
This is a normal food of Togo, normal is normal and special is special, culture is all things of a culture, not just special.
I read often about special foods of a country, I go to the country and never even see the food, I semi-believe what is obvious is the culture, and what is not obvious is history.