1. Cook the noodles according to package instructions. Drain and set aside.

2. Toss the sliced beef with cornstarch, coating the pieces evenly.

3. Heat 2 tablespoon of vegetable oil in a large skillet or wok over high heat. Add the beef in a single layer and sear for 2-3 minutes on each side until browned. Remove the beef from the skillet and set aside.

4. Add the remaining 1 tablespoon of oil to the skillet. Add the sliced red bell pepper and broccoli florets. Stir-fry for 4-5 minutes until the vegetables are tender-crisp.

5. Toss in the green onions, minced garlic, and grated ginger. Cook for 1-2 minutes until fragrant.

6. In a small bowl, whisk together the soy sauce, hoisin sauce, oyster sauce, honey, rice vinegar, sesame oil, and red pepper flakes (if using).

7. Return the cooked beef to the skillet with the vegetables. Add the cooked noodles and pour the sticky sauce over everything.

8. Toss well to combine, ensuring the noodles and beef are evenly coated in the sauce. Cook for 1-2 minutes until heated through.

9. Garnish with extra sliced green onions and serve hot.