Cook the egg noodles according to the package directions.
In a large frying pan, heat the oil. Add the chicken, season lightly with salt and pepper, and cook until golden and fully cooked (about 6–7 minutes).
Add the broccoli, capsicum, and carrot. Stir-fry for another 4–5 minutes, or until just tender.
Meanwhile, mix the sauce ingredients together. Pour the sauce over the chicken and vegetables, stir to coat, and let it simmer for 1–2 minutes, or until slightly thickened.
Divide the noodles evenly between serving bowls. Top with the chicken and vegetable mixture.
Garnish with spring onions, cashews, and sesame seeds. Enjoy!