Prepare Ingredients: Cube tofu, slice green onions, and soak dried seaweed (if using).
Heat Broth: In a pot, bring vegetable broth or dashi to a gentle simmer over medium heat.
Add Tofu & Seaweed: Add tofu cubes and seaweed, simmering for 2–3 minutes.
Dissolve Miso Paste: Take a small amount of hot broth in a bowl, mix with miso paste until smooth.
Combine: Stir the dissolved miso back into the pot. Avoid boiling to preserve flavor and nutrients.
Finish & Serve: Add sliced green onions, adjust seasoning if needed, and serve warm.