There's only one man who serves up a Chicago-style dog with a side of big Texas personality in downtown Dallas. And that's Vincent Navarro, better known as Uncle Vinny, who can be found at his cart parked somewhere along Main Street, looking out at the world through yellow-tinted shades. Vinny and his sister run the business, Sidewalk City Dogs, out of a warehouse suite in Garland. However, you'll find them vending in downtown. Ask the vendor for the Uncle Vinny special, and he'll take care of you, loading your dog with neon green relish, all the condiments and fresh tomatoes and lettuce. Find a wall to lean on and enjoy your $3 dog.