Wash the bok choy thoroughly and cut it into bite-sized pieces.
Slice the pork thinly and season with salt and pepper.
Heat cooking oil in a pan and stir-fry the pork.
When the pork is partially cooked, add the bok choy and stir-fry together.
Season with soy sauce, minced garlic, and sesame oil to taste.
Once the bok choy is wilted, turn off the heat and transfer to a plate.