01 - Combine sliced beef, 1 tbsp soy sauce, cornstarch, and sesame oil in a bowl. Mix thoroughly and set aside to marinate.
02 - Beat eggs with a pinch of salt in a small bowl and set aside.
03 - Heat 1 tbsp vegetable oil in a wok or large skillet over high heat. Stir-fry beef for 2 minutes until lightly browned. Remove and set aside.
04 - Add another 1 tbsp oil to the wok. Stir-fry garlic and the white parts of the spring onions for 30 seconds until fragrant.
05 - Add diced carrot, peas, and red bell pepper. Stir-fry for 2 to 3 minutes until vegetables are tender-crisp.
06 - Push vegetables to one side of the wok, pour in beaten eggs, scramble briefly, then combine with the vegetables.
07 - Add cold rice and gently break up any clumps. Stir-fry for 2 minutes until heated through.
08 - Return cooked beef to the wok. Add soy sauce, oyster sauce, optional fish sauce, and white pepper. Stir-fry for 2 to 3 minutes until everything is well mixed and hot.
09 - Adjust salt to taste and fold in green parts of spring onions just before serving.