For eight years, Guerrero-born Blanca Diaz sold Mexican hot dogs from her cart at 26th and Saint Louis, attracting a devoted neighborhood following. The street food, whose origins are disputed, consists of a hot dog wrapped in bacon and griddled, allowing the juiciness of the bacon to saturate the sausage. Toppings vary regionally, but Diaz's con todo gets grilled onion, both grilled and pickled jalapeños, tomatoes, mayo, mustard, and . . . ketchup. That's right—ketchup, the one condiment that's anathema to defenders of the traditional Chicago-style hot dog. At Diaz's brick-and-mortar place the hot dog con tocino has pride of place at the top of the menu. Other offerings include tacos (including al pastor, cecina, and barbacoa), tortas, burritos, sopes, and soups, among them a killer posole available on weekends in red, green, or white versions. Though alcohol is prohibited at Delicias Mexicanas, its late-night hours and breakfast offerings (huevos, chilaquiles) make it a good candidate for a final stop after last call.