Combine all the ingredients for the broth (except salt) and bring to a simmer. Simmer for 10 minutes, then remove the kelp.
Simmer another 10 minutes then strain through a mesh strainer.
Add salt as needed for flavor.
While broth simmers, mix the sauce ingredients together and set aside to allow flavors to meld.
Cut the fish cake sheets in strips and skewer them, or buy prepackaged fish cake skewers.
Add the skewered fish cakes to the broth and simmer for 3-5 minutes.
Serve skewers in broth garnished with green onions and dipping sauce on the side.
Notes
Strain the broth twice to make it extra clear if desired.
You can substitute fish cake sheets for cut up pieces of fish cake, skewered fish balls, or even fried tofu!
You don't have to skewer the fish cakes - you can just put the pieces of it right into the broth and eat it that way.
Taste the broth before adding the salt. Add a little at a time until it's salty enough for you (everyone has different salt preferences and the kelp and anchovies have saltiness already).