Sonoran Dog (Tucson)
This little gem from Sonora, Mexico – a bacon-wrapped, Mexican-dressed beef frank – is widespread in border states, particularly Arizona. It requires a sturdy bun, ideally a sliced, pliant Mexican bolillo roll, to stand up to its various add-ins, which may include beans, onions, tomatoes, mayo, mustard, various salsas, and guacamole.
Where to Get It: In Tucson, the indoor-outdoor El Guero Canelo is synonymous with Sonoran dogs, despite it being one of more than 100 places peddling them (it's also popular for burritos, tacos, and quesadillas). 5201 S. 12th Ave., Tucson, AZ