Cut the cabbage, pork, and onion into bite-sized pieces.
Heat oil in a pan and stir-fry the pork.
When the pork is halfway cooked, add the onion and cabbage, and stir-fry together.
Add gochujang, soy sauce, minced garlic, sugar, sesame oil, and pepper, and stir-fry evenly.
Once all the ingredients are cooked, serve them over rice.