01 - Combine sliced beef with 1 tbsp soy sauce, cornstarch, and sesame oil in a bowl. Let marinate for 10 minutes to tenderize and infuse flavor.
02 - Heat 1 tbsp vegetable oil in a large wok or skillet over medium-high heat. Sear the marinated beef for 2-3 minutes until browned on all sides. Remove from pan and set aside.
03 - Add additional oil if necessary. Sauté chopped onion and minced garlic for 1 minute until fragrant and translucent.
04 - Add diced carrot and bell pepper to the pan. Stir-fry for 2-3 minutes until slightly tender. Mix in frozen peas and continue cooking for 1 minute.
05 - Push vegetables to one side of the wok. Pour beaten eggs into the cleared space and scramble until just set, about 30-60 seconds.
06 - Add cooked rice to the pan, breaking up any clumps with a spatula. Return seared beef to the pan and toss all ingredients together.
07 - Pour in soy sauce, oyster sauce, dark soy sauce, and white pepper. Stir-fry everything together for 2-3 minutes until heated through and well combined.
08 - Stir in sliced spring onions, adjust seasoning if needed, and serve immediately while hot.