Dionicio Jimenez draws on the cuisines of Puebla and Veracruz to run one of the more serious Mexican kitchens in the city, all inside a converted diner on Chestnut Street dressed up with vintage movie posters and the original lunch counter. The stuffed poblano with walnut sauce, pomegranate, and cinnamon-scented beef is the dish to order, though the mole negro and the huitlacoche quesadillas made with house tortillas aren't far behind. Happy hour brings $2-$4 tacos and $5 margaritas to a room that fills up fast with the after-work Rittenhouse crowd.