Supposedly the best tostadas in the city can be found in this market. There are quite a few stalls selling them. The most popular one is "Las Originales" at the back and it's damn tasty. Go for the Tinga de Pollo, Salpicón and the Jaiga (blue crab). And any of the excellent juices. Don't be intimidated by the line, it goes quickly. Also note the market itself, which is an excellent Félix Candela structure.