01 - Combine the sliced beef with 1 tablespoon soy sauce, cornstarch, 1 teaspoon sesame oil, and black pepper in a bowl. Let marinate for 10 minutes.
02 - Heat 1 tablespoon vegetable oil in a large wok or skillet over high heat. Stir-fry the marinated beef for 2 to 3 minutes until just browned. Remove and set aside.
03 - Add remaining 1 tablespoon vegetable oil to the wok. Stir-fry garlic, ginger, and the white parts of spring onions for 30 seconds until fragrant.
04 - Add diced carrots and bell pepper to the wok, stir-frying for 2 minutes. Add green peas and cook for an additional minute.
05 - Incorporate cooked rice, breaking up any clumps with a spatula. Stir-fry for 2 to 3 minutes until heated through.
06 - Return beef to the wok. Add soy sauce, oyster sauce, toasted sesame oil, and white pepper if desired. Toss until everything is evenly coated and heated, about 2 minutes.
07 - Stir in the green parts of the spring onions. Remove from heat and serve immediately.