Marinate the beef:
In a bowl, mix soy sauce, oyster sauce, hoisin sauce, and cornstarch. Add sliced beef and toss to coat. Let it marinate while you prep the veggies.

Stir fry the beef:
Heat oil in a large pan or wok over high heat. Add the beef in batches and stir-fry for 2–3 minutes until browned. Remove and set aside.

Cook the veggies:
In the same pan, add a splash of oil if needed. Stir-fry the bell peppers, broccoli, and carrot for 4–5 minutes until just tender. Add garlic, ginger, and spring onions and sauté for another minute.

Combine and finish:
Return the beef to the pan. Toss everything together and cook for another 1–2 minutes until heated through and coated in the sauce.

Serve:
Dish up over hot rice or noodles. Garnish with sesame seeds and coriander if desired.

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