Place the seaweed in a bowl, add cold water to soak and expand, then rinse lightly to remove impurities. Drain and set aside.

In a soup pot, bring an appropriate amount of water to a boil, then add the seaweed.

Add the miso (use a strainer to hold the miso, stirring with a spoon until dissolved).

Once the soup boils again, add some brown sugar to adjust the taste, and finally sprinkle with chopped green onions to finish.