In the tale of Don Lázaro El Viajero, a Spanish Jew named Lázaro L. Torra, escaping the fascist advance in that nation’s civil war, fled in 1939 to Mexico City – one of tens of thousands that then-President Lázaro Cárdenas invited to find refuge in Mexico amid the black conflict of that war. By 1944 Torra had become something of a restaurateur/maestro, teaching kids in a kinda-working-class, kinda-middle-class neighborhood to speak in English and improve their Spanish and feeding them some decent grub in the same go. (The name of the restaurant, Mr. Lazarus the Traveler, has to do with its proximity to a road heading out of town before the city went all crazy huge and viral.) That was the deal. You got food, but you had to learn something in the process.

For the most part, hamburgers in Mexico City disappoint. The accepted bread-to-beef ratio is shameful, with slender slices of overcooked meat hiding somewhere within the pillowy fluff of too much bread. The stringy, flavorless beef underwhelms. Even worse are the fancy sandwiches one finds at upscale burger joints, where blue cheese and spinach and a dozen other inappropriate ingredients only momentarily distract from the aforementioned defects of bad meat and a surfeit of bread. Against this dim backdrop of underachievement, the hamburgers at the Legión Americana shine like stars. This is something of a surprise considering the no-frills, dive bar atmosphere here.

“Caliente!” Juan calls out, and we all duck to avoid the steaming hot pan as it floats across the kitchen. He holds one side with a folded up towel, the other with a pair of pliers. Kitchen might be a bit of a misnomer. The small stall sits on the sidewalk, with a temporary tin roof overhead and brand new white tarps tied tightly to the back to protect against Mexico City’s afternoon thunderstorms. Each day for the three weeks leading up to Día de los Muertos, the Day of the Dead holiday, Tito Garcia, the stand’s owner, and the rest of the crew, will make hundreds of pan de muerto sweet rolls, as part of the Jamaica Market’s holiday romería.