Cut the thinly sliced pork, onion, and green onion into bite-sized pieces.
Heat oil in a pan and stir-fry the pork.
When the pork is about halfway cooked, add the onion and green onion and continue stir-frying.
Add the rice and mix well to combine the pork and vegetables evenly.
Season with soy sauce, salt, and black pepper to taste.
Once all ingredients are well mixed, turn off the heat and serve on a plate.