On Margarita, the broth is sold at dawn specifically as a hangover remedy, with vendors setting up near the beach bars just as the previous night's crowd is heading home.
The same tiny clams used in the pastries are simmered with garlic, cilantro, and lime into a light, briny broth, strained, and served hot in a cup. Early-morning vendors near Margarita's beaches and bars ladle it out from big pots.