The line between legend and actual history is often blurred by time, particularly when it comes to the origins of beloved foods. Such is the case of Oaxaca’s most popular cheese, quesillo, a type of string cheese that’s a member of the pasta filata (“spun paste” in Italian) family, similar to mozzarella. The most widespread origin story is that in 1885, Leobarda Castellanos, a 14-year-old girl in charge of preparing the cheese at her family’s business, got distracted and let the milk coagulate past the exact point for making cheese. To avoid being punished, she tipped hot water over the milk, accidentally creating a gummy product that unexpectedly became very popular among the clients of the Castellanos family in the Oaxacan village of Reyes Etla, the official birthplace of quesillo.

Our trip to Taquería Los Parados in Roma Sur last month began like any other: we gathered up four friends and began the trek to this beloved taco spot. But the dark, moody sky threatened rain, and in anticipation of a gushing downpour, we piled into a cab minutes before the first giant, icy cold rain drops began to pelt down. As was so often the case on July and August evenings in Mexico City, we were at the mercy of the Aztec rain god Tlaloc. Our destination, Los Parados, is one on a short list of taco joints usually shouted at full volume to rally the hungry boozers after a Roma-Condesa bar crawl. On this night, however, it was the taxi itself getting sloshed.