01 - Combine thinly sliced beef with 1 tbsp soy sauce, cornstarch, and sesame oil in a bowl. Mix thoroughly and set aside while preparing other ingredients.
02 - Beat eggs with a pinch of salt in a small bowl until smooth.
03 - Heat 1 tbsp oil in a large wok or skillet over high heat. Stir-fry beef for 2 minutes until just browned, then remove and set aside.
04 - Add another 1 tbsp oil to the wok. Stir-fry garlic and white parts of spring onions for 30 seconds until fragrant.
05 - Add diced carrot, peas, and bell pepper. Stir-fry for 2 to 3 minutes until vegetables begin to soften.
06 - Push vegetables aside, pour in beaten eggs, scramble briefly, then combine with vegetables.
07 - Add cold rice, breaking up any clumps. Stir-fry continuously for 2 minutes until heated through.
08 - Return beef to pan. Add soy sauce, oyster sauce, optional fish sauce, and white pepper. Stir-fry for 2 to 3 minutes until fully incorporated and hot.
09 - Adjust salt to taste. Stir in green parts of spring onions just before removing from heat and serving.