Marinade the pork with the following for 15 minutes: ¼ teaspoon salt, 1 teaspoon cornstarch, ½ teaspoon oil, ⅛ teaspoon white pepper.
Heat a tablespoon oil in your wok over medium heat, add the marinated ground pork to the wok. Cook for a minute to brown it, and then add the ginger, garlic, and mushrooms* Stir fry everything together for another 2-3 minutes.
**Add the Hoisin, sweet bean sauce, bean paste, dark soy sauce, and water, stirring everything together well. Lower the heat and cover the wok. Simmer the sauce for 15-20 minutes, stirring occasionally to prevent sticking.
Meanwhile, cook the noodles according to the package directions.
Top noodles with the sauce and garnish with the julienned carrots, cucumbers, and scallions.