Heat your wok, skillet or frying pan on a super high heat. Add the frozen green beans cover and cook for a minute. Stir and keep cooking for another minute or until the green beans are hot and a little charred in places.
Place hot beans in a clean bowl.
Return the pan to the heat and add a splash of oil. Then add the chicken. Cook stirring often until the chicken is no longer pink. You can brown it if you like but I prefer to keep it moister.
Return beans to the pan and toss to warm.
Remove wok or frying pan from the heat and stir in oyster / soy sauce. Taste and season with more sauce if needed.