Slice the beef thinly against the grain for maximum tenderness.
Stir-Fry:
Heat a tablespoon of oil in a wok or large skillet over high heat. Add the beef and stir-fry for 2–3 minutes until browned but not overcooked. Remove and set aside.
Cook the Vegetables:
In the same pan, add the sliced onion and chilies. Stir-fry for 2–3 minutes until slightly softened but still crisp.
Combine:
Return the beef to the pan and add soy sauce. Stir-fry everything together for another 1–2 minutes, ensuring the beef and vegetables are evenly coated with the sauce.
Serve:
Serve hot over steamed rice or noodles for a quick, flavorful meal.
