Combine oyster sauce, soy sauce, dark soy, fish sauce, ground black pepper, and rice vinegar in
small bowl. Mix until well-blended and set aside.
Season the chicken with salt and sprinkle with cornstarch and mix well. Set aside.
In a heated skillet over medium heat, add oil and fry the chicken until nice and golden.
Push the chicken on the side and add sauté the sliced ginger and sliced garlic for a couple of seconds.
Toss in the bell pepper, cashews, and green onions together with the chicken for 2 minutes.
Pour the sauce mixture over and mix well. Lower down to a simmer for 2 minutes.
Optional: sprinkle with sesame seeds before serving.