To make Soy Vinaigrette: Whisk together all ingredients until blended. (Yield: 3 cups)
For each serving, to order: Toss together 1 cup soba, 1/2 cup chicken, 1/2 cup sprouts, 1/2 cup peppers, 1/4 cup green onions and 2 tablespoons Soy Vinaigrette. Mound on serving plate; sprinkle with 1 tablespoon cilantro.