Step 1

Whisk oil, cooking wine, potato starch, salt and pepper in a bowl and marinate the pork for about 10 minutes.

Step 2

Mix oyster sauce, dark soy sauce, water, vinegar and sugar in a bowl to serve as the seasoning later.

Step 3

Heat oil in a pan over medium high heat, stir in the pork and cook for about 2 minutes until changes color and remove from the pan.

Step 4

Turn to high heat, and add the green pepper into the pan, stir fry for about 2 minutes until soft.

Step 5

Turn the heat back down to medium-high, add the pork back into the pan and pour in the sauce, stir for another 1-2 minutes, remove from pan and serve.