During the episode, he visits the nearby state of Puebla and tries mole negro, a chocolate-chili sauce extremely famous here. Chicken with mole negro might be my favorite dish here.
My biggest criticism with the episode is that he doesn't visit any high-end restaurants in Mexico, even though he often visits several high-end restaurants in other cities. I think it's too simplistic when talking about food in Mexico to just focus on the street food or the simple family eateries, especially when earlier this year a Wall Street Journal reporter went to great lengths to highlight the amazing fine dining options here. I remember watching some idiot on 'Top Chef' once claiming that Mexican found cannot be haute cuisine. Fortunately, he didn't win, and fortunately for Chicagoans, there's some amazing high-end Mexican food in the city, most notably the restaurants of Rick Bayless. Unfortunately, even some Mexicans don't realize their food can be like this (I remember a student a month ago commenting to me that Mexican food can't possibly be gourmet).