Cook the Hot Dog: Steam or grill the all-beef hot dog until heated through.
Prepare the Bun: Warm the poppy seed bun by lightly steaming or toasting it.
Assemble: Place the hot dog in the bun, then layer on the mustard, onions, relish, tomato slices, pickle spears, sport peppers, and a sprinkle of celery salt.
Serve: Enjoy immediately for that authentic Chicago bite.
