For soups, add your favourite vegetables or other ingredients to Shiitake Dashi, simmer until tender, and season with a little salt and Shoyu or Tamari and Mirin to taste (about 1 tablespoon of each). If desired, add a little fresh ginger juice.
Broth for Soba or Udon is made the same way, except that more Shoyu or Tamari is added (about 1 tablespoon for every 2 cups of broth). Increase the Mirin, if desired, and season with ginger or wasabi. Ladle the hot broth over bowls of cooked soba or udon and garnish with minced green onions.