Put enough water in a medium saucepan to reach the bottom of a steamer basket. When the water boils, reduce the heat to medium and add the hot dogs to the basket. Cover with a lid, and steam until hot, 5 to 7 minutes.
Place the buns over the hot dogs, cover the pan, and steam until the buns are warmed through, about 30 seconds.
On a serving platter or on individual plates, place a hot dog in each bun. Nestle 2 tomato wedges on one side of each hot dog and a pickle spear on the opposite side.
Top each hot dog with 1 tablespoon of relish, then squirt the mustard over the tops in a zig-zag pattern.
Sprinkle each hot dog with 1 tablespoon of diced onion.
Top each hot dog with 2 sport peppers and finish with a light sprinkling of celery salt. Serve immediately.