Cut the pork shoulder into bite-size pieces.
Slice the onion thinly.
Heat cooking oil in a pan and stir-fry the pork shoulder.
When the pork is cooked, add the onion and stir-fry together.
Add soy sauce, sugar, minced garlic, and pepper, and stir-fry until the seasoning is well-absorbed.
Place the stir-fried pork over rice.
Finish by topping with green onion, sesame oil, and sesame seeds as desired.