Mix 2 Tbsp Soy Sauce, 1 Tbsp Oyster Sauce, 1 tsp Sherry and 1 tsp water in a bowl. Marinate chicken in it for approximately 1/2 hour.
Mix 10 fl oz Chicken Broth, 4 Tbsp Soy Sauce and 2 Tbsp Oyster Sauce. Set aside.
Put the steam fried noodles in a pot of slightly salted boiling water. Boil for 2-3 minutes, stirring occasionally. Do not overcook. When cooked pour into a colander and let drain and dry.
Heat the wok and add the 4 Tbsp of Cooking Oil,swirling to coat the sides. Add the steam fried noodles and fry until about half the noodles are browned and crispy. Place noodles on an oven-friendly plate and place in the oven at minimum temperature to keep warm.
Add the 2 Tbsp of Oil to the wok. When Oil starts to smoke add the Green Onions, ginger and garlic for a few seconds until it starts to soften. then add the bean sprouts and stir fry for 1 minute. Add the marinated chicken and fry for 3 minutes. Add the Chicken broth mixture and cook for 3-4 minutes or until chicken is done. Mix the corn starch with the water and stir into mix. If gravy does not thicken to your desire add more cornstarch.
Pour over the crispy noodles and serve.