Bring water to a boil. Puree the miso with 2 teaspoons cold water. Reduce flame to low and add pureed miso. Tear nori into small pieces and add to the soup. Simmer 2 minutes. Add scallions and serve.
Per serving - 15 calories, 0 gram fat (20% calories from fat), 1 gram protein, 2 gram carbohydrate, 1 gram fiber, 0 milligram cholesterol, 279 milligram sodium