In a blender, puree the spinach, pickled ginger, miso, mirin and sansho powder with 2 tablespoons of water until smooth and spreadable. ? In a small bowl, whisk the soy sauce, sake and mirin.
Next go in sliced shiitake mushrooms followed by fresh garlic, miso paste, vinegar and soy sauce. Reserved pasta cooking water is added to the pan, and pieces of butter are whisked in one at a ...