Build the base
Add a splash of oil to a pot.
Sauté ginger, garlic, and mushrooms for 2–3 minutes until fragrant.
Simmer
Pour in the water or broth.
Bring to a gentle simmer for about 5–7 minutes so the flavors meld.
Add greens and tofu
Stir in bok choy or spinach.
Add tofu if using.
Simmer 2 more minutes until greens wilt.
Add miso (off the heat)
Turn off the heat.
Scoop the miso paste into a small bowl, add a ladle of hot broth, and whisk until smooth.
Stir this miso mixture back into the pot.
(This keeps the miso’s flavor and nutrients intact.)
Finish
Top with green onions.
Taste and adjust seasoning (miso is salty, so you may not need extra salt)