"a few lumps of some stuff like half-cooked dough"
'Buying Cassava Dumplings (
Public Domain'Buying Cassava Dumplings ("Kwanga") at Stanley Pool' (c. 1900) - Credit: W. Holman Bentley

This is kwanga, a type of fermented bread made from the flour of the manioc (or cassava) root, which is wrapped in banana leaves and boiled into a dough. It remains a traditional dish of the Democratic Republic of Congo as well as of the neighbouring Republic of the Congo (where it is known as chikwangue).