Steps
1. Slice the chicken breast into thin strips.
2. In a small bowl, mix together the soy sauce, oyster sauce, sesame oil, cornstarch, red pepper flakes, salt, and pepper.
3. Heat some cooking oil in a wok or large skillet over medium-high heat.
4. Add the minced garlic and stir-fry for about 30 seconds, until fragrant.
5. Add the chicken strips and stir-fry for 2-3 minutes, until cooked through.
6. Remove the chicken from the wok and set aside.
7. In the same wok, add a little more oil if needed and stir-fry the broccoli, bell pepper, and mushrooms for 2-3 minutes, until slightly tender.
8. Add the mixed nuts and stir-fry for another minute.
9. Return the chicken to the wok and pour in the sauce mixture.
10. Stir-fry for an additional 1-2 minutes, until the sauce has thickened and coated the ingredients.
11. Serve hot with steamed rice or noodles.