Miso Soup

Combine wakame with warm water to cover by 1 inch and let stand 15 minutes, or until reconstituted.

Drain in a sieve.

Stir together miso and 1/2 cup dashi in a bowl until smooth.

Heat remaining dashi in a saucepan over moderately high heat until hot, then gently stir in tofu and reconstituted wakame. Simmer 1 minute and remove from heat. Immediately stir in miso mixture and scallion greens and serve.