01 - In a bowl, combine sliced beef with soy sauce, cornstarch, sesame oil, and black pepper. Toss well and set aside to marinate for 10 minutes.
02 - Cook noodles according to package instructions. Drain and set aside.
03 - Blanch broccoli florets in boiling water for 2 minutes until bright green and crisp-tender. Drain and rinse under cold water.
04 - In a small bowl, whisk together soy sauce, oyster sauce, dark soy sauce, brown sugar, rice vinegar, and broth until combined.
05 - Heat 1 tablespoon vegetable oil in a large wok or skillet over high heat. Add beef and stir-fry until just browned, about 2–3 minutes. Remove beef from pan and set aside.
06 - Add remaining vegetable oil. Sauté garlic, carrot, and blanched broccoli for 2 minutes over high heat.
07 - Return beef to the pan. Add cooked noodles and pour in the sauce. Toss together over high heat for 2–3 minutes until evenly coated and heated through.
08 - Sprinkle with sliced scallions and serve immediately.