Marinade the chicken with 2 teaspoons of soy sauce, rice vinegar and sesame oil in a small bowl. Set it aside while you cook the noodles according to package directions. Drain the noodles well.
Heat the peanut oil in a large skillet. Add the marinated chicken when the skillet is very hot and stir-fry until cooked through.
Remove the chicken from the skillet and set aside.
Add the broccoli, red bell pepper and garlic, stir-fry for 2 minutes then add the noodles and keep stirring for another 2 minutes.
Add the remaining soy sauce, oyster sauce, cooked chicken to the skillet. Keep stirring for 2 more minutes.
Serve in a plate and enjoy when the noodles are still warm.