Place the roasted walnuts in a food processor or blender and finely grind them. Place the water and miso in a medium skillet and heat, stirring the miso constantly to dissolve. Add the walnuts and scallions. Mix thoroughly with the miso. Heat, stirring frequently for 2 to 3 minutes. Remove.
Per serving - 43 calories, 4 gram fat (69% calories from fat), 2 gram protein, 2 gram carbohydrate, 1 gram fiber, 0 milligram cholesterol, 163 milligram sodium