Cook Quinoa according to package directions. Soak Shiitake mushrooms until soft about 30-45 minutes. Bring 2 cups of water to a boil. When shiitakes are soft remove stems and slice caps. Add soaking liquid and and shiitakes to boiling water and cook for 30 minutes. Add sliced onions, cook another 5 minutes. Add remaining water and shoyu, bring to a boil, stir in dissolved kudzu, turn off heat. Liquid will thicken and become clear. Serve over Quinoa. Garnish wtih chopped green onions.