stir-fried pak-choi with prawn oyster sauce /บ้อกช่อยผัดกุ้ง

ingredients
50 gram fresh shiitake mushroom
100-200 gram fresh prawn
1 tbsp shaoxing rice wine
2 tbsp soya sauce
1 tbsp sesame oil
1tbsp cornflour
200 gram head pak-choi
2 tbsp vegetable oil
2 tbsp oyster sauce
method
1.clean fresh prawn and place in mixing bowl add shaoxing rice wine , soya sauce , sesame oil , cornflour. stir to combine, then set aside to marinate for 15 minnutes
2.meanwhile, trim the base of the pak-choi and wash the stalks thoroughly. cut off the leaves and set aside, then chop the stalk into slices about 2-3cm wide and set aside separately form leaves
3. heat the vegetable oil in a wok. when very hot and slightly smoking, add the prawn mixture and stir-fry for2-3minnutes, or until brown. remove the prawn from the wok using a slotted spoon and set the meat aside to mean
4.add garlic and fresh shiitake mushroom to the wok and stir-fry for 1-2 minutes or until golden. add the chopped stalks of pak-choi and stir-fry for4-5minutes then add the leaves, oyster sauce and 1/2 cup chicken stock and continue stir-frying until the sauce is bubbling.
5.return the prawn to the wok and heat through with the pak-choi for 1-2 minutes, then serve