Egg Foo Young (Chinese Omelette, 芙蓉蛋)

Name: Egg Foo Young (Chinese Omelette, 芙蓉蛋)
Prep time: 10 min
Cook time: 10 min
Total time: 20 min
Cuisine: Chinese
Ingredients: 1 tablespoon oyster sauce; 1 tablespoon light soy sauce; ½ teaspoon dark soy sauce; ½ teaspoon sesame oil; 1 tablespoon cornstarch; 1 pinch ground white pepper; 1 pinch garlic powder (optional); 1 pinch sugar; 240 ml water, or unsalted stock (about 1 cup); 6 eggs; 50 g shrimp (raw), diced (about ⅓ cup (see note 1)); 50 g chicken (precooked), diced (about ⅓ cup (see note 1)); 50 g bean sprouts (about ½ cup); 30 g carrot, grated (about ⅓ cup); 30 g scallions, finely chopped (about ⅓ cup); ⅛ teaspoon salt; Neutral cooking oil; Sweet soy sauce, or light soy sauce (to taste); homemade chilli oil (to taste); Scallions, finely chopped; Toasted sesame seeds