Heat 1 tablespoon of vegetable oil in a large pan or wok over high heat.
Add steak slices, season lightly, and cook for 2 to 3 minutes until browned. Remove and set aside.
Add a bit more oil if needed, then cook shrimp 1 to 2 minutes per side until pink and opaque. Remove and set aside.
Add a small amount of oil, pour in beaten eggs, and scramble quickly. Remove and set aside with meat.
Add garlic and ginger to the pan and cook for about 30 seconds until fragrant.
Add cooked rice, breaking up any clumps, and stir-fry for 3 to 4 minutes until heated through.
Return steak, shrimp, and eggs to the pan. Add mixed vegetables, soy sauce, oyster sauce, and sesame oil. Stir well and cook for another 2 to 3 minutes.
Add sliced green onions, adjust salt and pepper to taste, then serve hot.