Steps
1. Slice the chicken breast into thin strips.
2. Julienne the carrot, slice the mushrooms, onion, and bell pepper.
3. In a small bowl, mix together soy sauce, oyster sauce, sesame oil, cornstarch, red pepper flakes, salt, and pepper.
4. Heat some cooking oil in a wok or large skillet over medium-high heat.
5. Add the chicken strips and stir-fry until cooked through. Remove from the pan and set aside.
6. In the same pan, add a bit more oil if needed, and stir-fry the carrots, mushrooms, onion, and bell pepper until tender-crisp.
7. Return the cooked chicken to the pan and pour in the sauce mixture. Stir-fry for another minute or until the sauce thickens.
8. Serve hot over steamed rice or noodles.