Stir in the thinly sliced chicken. When the chicken has started to cook on the outside, add the oyster and soy sauces, carrot and courgette. Keep stirring until the chicken is almost cooked through and the vegetables are tender but still crunchy. Add the stock to the pan and simmer for another 2-3 minutes, until pipping hot and the chicken is completely cooked through. Serve, garnished with the coriander leaves, salad onion and cucumber.