Kasava is a plant. Parts of the plant are rinsed, since it is otherwise toxic, and eventually ground and formed into a flat bread. This formed the basis of the indigenous Kalinago diet. I tasted it once and it is quite fibrous… an acquired taste.
This picture was taken soon after I arrived in Dominica, on a Peace Corps organized excursion to the Kalinago model village. Here you can see the items used for the preparation of the kasava bread.