Gather miso paste, dashi or broth, water, tofu, wakame, and scallions
Heat water or dashi in a pot until hot but not boiling
Add tofu and wakame, then simmer briefly
Turn off the heat
Place miso paste in a small bowl or ladle
Dissolve the miso paste with a little hot broth
Stir the dissolved miso back into the pot
Do not boil after adding miso
Add sliced scallions
Taste and adjust with more miso if needed
Serve warm