The words “gourmet hot dog” might sound like an oxymoron. But the handmade specialty frankfurters at this food truck have serious pedigree. The truck’s owners (one of them is a well-known cookbook store owner and cooking teacher) are on a mission to give the lowly hot dog a makeover. They grind the pork, beef and veal themselves and stuff it into natural casings. They hired a local baker to make their sesame- and poppy-seed-studded milk buns according to their own recipe. They even whip up their own mustard and mayonnaise. All that to say these are no ordinary ballpark franks. Take, for example, the Middle Eastern shawarma dog with garlic sauce, hummus and pickled turnips, or the bibimbap, which stuffs Korean pickled carrots, sesame dressing and bean sprouts in along with the wiener.