Bring two quarts of water to a boil in a soup pot. When cooking 100% soba, it foams up. Make sure the soup pot is tall. Place the soba, wakame flakes and shiitake in the pot. Bring to a boil again. Turn the flame to medium-low and simmer 10 minutes or until the soba is tender. Do not boil the soba rapidly or over cook as they tend to fall apart easily. When done, pour into a colander, rinse thoroughly with cold water and drain. Place in a mixing bowl with the vegetables. Mix the water in a small bowl with the shoyu soy sauce and ginger. Pour over the soba and vegetables and toss to mix. Serve room temperature or chilled.
Per serving - 192 calories, 1 g fat (4% calories from fat), 7 g protein, 43 g carbohydrate, 6 g fiber, 0 mg cholesterol, 440 mg sodium