Cut the pork into bite-sized pieces.
Season the pork with salt and pepper.
Mix potato starch and egg to make a batter.
Heat plenty of cooking oil in a pan to 170℃.
Fry the pork until crispy.
Stir-fry onion, carrot, cucumber, etc. in a pan.
Make the sauce with water, sugar, vinegar, and soy sauce.
Thicken the sauce with a starch slurry.
Pour the sauce over the fried pork to finish.