The tiny island of Fadiouth, in the Sine-Saloum delta, is built on centuries of discarded oyster shells — its ground is literally made of them.
Mangrove oysters are hand-harvested from the roots of the Sine-Saloum delta's mangroves, then boiled and sun-dried or smoked into small, intensely savory nuggets called yokhoss. They're sold in market bundles and stirred into rice dishes and stews rather than eaten raw.