Welcome to Chicago, Hot Dog Town, U.S.A.
CHICAGO — Before leaving the city for graduate school, Heidi Ratanavanich got a shoulder tattoo of a Chicago-style hot dog. Painterly and bright, the tattoo depicts a poppy-seed bun cradling a shiny frankfurter, which is topped with a squiggle of yellow mustard, neon-green sweet pickle relish, chopped white onion, two tomato slices, a pickle spear,…