01 - Whisk together eggs, milk (or water), and a pinch of salt until well combined. Heat 1 teaspoon oil or butter in a nonstick skillet over medium heat. Pour in egg mixture, tilting pan to form a thin layer. Cook for 1-2 minutes until just set, then carefully flip and cook for 30 seconds more. Remove from pan, let cool slightly, and slice into thin ribbons. Set aside.
02 - Heat 1 tablespoon vegetable oil in a large wok or skillet over medium-high heat. Add sliced chicken and cook for 3-4 minutes until golden and cooked through. Remove chicken and set aside.
03 - In the same wok, add remaining 1 tablespoon oil. Add onion and garlic, sauté for 1-2 minutes until fragrant and translucent. Add peas and carrots, stir-frying for another 2 minutes.
04 - Add cooked rice to wok, breaking up any clumps. Stir-fry for 2-3 minutes until heated through. Return cooked chicken to wok. Add soy sauce, oyster sauce, sesame oil, white pepper, and salt to taste. Mix thoroughly to combine and heat everything through. Stir in sliced scallions, reserving a few for garnish.
05 - Transfer fried rice to serving plates. Top each portion with sliced egg omelette ribbons. Garnish with extra scallions and sesame seeds if desired.