Wash and chop the vegetables: Clean all the vegetables: Bell pepper, carrot, spinach, onion, mushroom and scallion. Julienne the carrot, and bell pepper. Chop the scallion 5 cm in length. Slice the mushrooms in chunky bits.
Prepare the Marinade: Add the Dark Soy sauce, Rice wine vinegar, Oyster Sauce, Sugar, Black Pepper, Sesame seed oil and Salt to a bowl. Mix and stir well.
Stir-fry the Vegetables: Add three tablespoons of the marinade to the wok. Place the sliced onion in a preheated pan on medium-low temperature. Place the carrots, onions, julienne bell pepper in a preheated pan on medium-low temperature. Drizzle the olive oil and cook for 2-3 minutes or until they are soft. Drizzle the olive oil and cook for 3-5 minutes or until caramelized. Add the spinach into the same pot and cook for two minutes.
Cook the Beef: Add the sliced beef with minced garlic and mushroom into the same wok and cook for six minutes on medium high heat. Add two tablespoons of the marinade to the beef.
Cook the glass noodles: Bring the water to boil in a separate pot. Add 300 grams of glass noodle, Cook for 8 minutes with the covered lid. Remove the noodles and rinse in cold water. Place the cooked noodles in a bowl.
Final steps: Pour the balance of the soy sauce marinade into the bowl of glass noodles. Mix them thoroughly so that marinade is absorbed into all parts of the noodle. Place the freshly chopped scallion, cooked vegetables and the beef around the noodles. Thoroughly mix everything. Sprinkle sesame seeds to serve.