Forget what you've read in the travel guides. Semitas “Beto” serves the best cemitas in Puebla, period. Its pork tenderloin cutlets are pounded thin, breaded with the crumbs scooped out of the sesame seed roll the sandwich is served on, and quickly fried in oil. The meat is topped with onion and avocado slices, stringy quesillo cheese, homemade chipotle sauce, and pápalo (a cilantro meets arugula-type herb).