Sopa de Tichinda de Chacahua

Oaxaca, Costa Chica, Laguna de Chacahua. This soup belongs to the Afro-Mexican corridor of Costa Chica Oaxaca, where Chacahua, Corralero, and Pinotepa look toward the Pacific and the mangrove feeds the pot. The women who make it know the lagoon before they know the stove; they know which roots hold tichindas and which morning water gives clean shells. Pregúntale a las señoras del mercado.

Tichindas are black-shell mangrove mussels. Not generic mussels. They are pulled from the roots at dawn, scrubbed until the mud gives up, opened just enough to save their liquor, then folded back into a broth that tastes like lagoon, chile, and green herbs. If you use ordinary mussels, say the truth: it is a compromise.

The broth is green from tomatillo, hoja santa, and epazote. The chile costeño brings the coast. A little guajillo gives body without stealing the color. Yuca and plátano macho make the soup eat like a meal, and the chochoyotes, small masa dumplings with a thumbprint in the center, hold the broth the way the women of the coast designed them to. La manteca es el sabor, even in a seafood soup, because the sauce must be fried before it becomes serious.

My mother did not make this in Colonia Roma; she was from Jalisco. I learned this one in Chacahua, standing near a pot set on a low fire while the cook corrected my hand on the masa. This is not food from a single Mexico. This is a 32-state cuisine, and Costa Chica Oaxaca has its own voice. Cada estado, su propia cocina.