Pour the dashi soup stock in a medium size sauce pan on medium heat.
Add in the tofu, onions, mushrooms, and seaweed if you are using it and let simmer for approximately 5 minutes.
Take 1 cup of the soup stock and place in a pan with the miso paste and let it dissolve. Add this mixture back into the soup.
Add a splash of soy sauce or Braggs to taste.
Serve warm.