Boil a medium-size pot of water .
Add the noodles and cook al dente.
Strain the noodles in a colander or wire mesh strainer.
Heat the sesame oil in a wok or dutch oven.
After 60 seconds when the oil is hot, add the diced onion and sauté, stirring occasionally for 3 minutes until fragrant and lightly golden.
Push the onions to one side of the pan, and add the torn mushroom pieces. Sautee, stirring occasionally for about four minutes until the mushrooms are tender.
Stir in the beansprouts, and garlic chives, and continue to sauté for 2-3 minutes until both are wilted in appearance.
Add the cooked noodles, tamari, coconut sugar and if you are using it, the Shaoxing wine. Stirfry until the noodles are well coated in the sauce.
Place the contents of the wok into an attractive serving dish and garnish with minced chives, and toasted sesame seeds.