In a small bowl, combine chicken with the marinade ingredients. Set aside.
In a small bowl, combine shrimp with marinade ingredients. Set aside.
In a medium bowl, combine gravy ingredients and set aside.
In another small bowl, combine 1 tablespoon dark soy sauce, 1 tablespoon soy sauce and ⅛ teaspoon sugar for the rice noodles.
Make sure the noodles are somewhat separated and not stuck in a big clump. In a wok or large frying pan on medium high heat, add 2 tablespoons oil. Evenly distribute noodles and stir fry for 1 minute. Add the dark soy sauce, soy sauce and sugar mixture. Stir fry, making sure to scrape the bottom of the wok and that the noodles are evenly coated with the sauce and heated through. Remove onto a serving platter.
Add 1 tablespoon oil, add the shrimp and cook for 1 minute. Remove and set aside.
In the same pan, add the chicken and stir fry until cooked through.
Turn the heat down to medium. Add garlic. Stir fry for 30 seconds, until fragrant.
Pour in sauce and bring to a boil. Add fish cake and vegetables. Once the sauce is boiling again, stir in the cornstarch slurry until the sauce is thickened.
While gently stirring the sauce, slowly drizzle in the egg to create the egg ribbons. Return the shrimp and heat through.
Scoop the mixture over the rice noodles. Drizzle with sesame oil and sprinkle ground white pepper. Garnish with fried shallots.