Preparation:

Step1: Marinate the beef

1. In a medium bowl, combine soy sauce, oyster sauce, cornstarch, and sesame oil.
2. Add the thinly sliced beef and coat evenly with the marinade.
3. Cover and let it marinate for at least 20 minutes (or up to 2 hours in the fridge for deeper flavor).

Step2: Prepare the noodles

1. Cook the noodles according to the package instructions. Drain and set aside.
2. Toss the cooked noodles with a little sesame oil to prevent sticking.

Step3: Make the sticky sauce

1. In a small bowl, whisk together soy sauce, hoisin sauce, honey or brown sugar, rice vinegar, minced garlic, grated ginger, sesame oil, and the cornstarch slurry.
2. Set the sauce aside for later.

Step4: Stir-fry the vegetables

1. Heat 1 tablespoon of vegetable oil in a large wok or skillet over medium-high heat.
2. Add the broccoli, carrots, and bell pepper. Stir-fry for 3–4 minutes until slightly tender but still crisp.
3. Remove the vegetables from the wok and set aside.

Step5: Cook the beef

1. In the same wok, add a little more oil if needed.
2. Add the marinated beef in a single layer. Cook for 2–3 minutes on each side until browned and cooked through.
3. Remove the beef and set aside.

Step6: Combine and toss

1. Return the cooked vegetables to the wok.
2. Add the prepared sticky sauce and bring to a simmer.
3. Add the cooked noodles and beef, tossing everything together to coat evenly in the sauce.
4. Cook for another 2–3 minutes until the sauce thickens and clings to the noodles.