Shred the cabbage, Cheongyang chili peppers, and onion.
Cut the pork into bite-sized pieces.
Add oil to a pan and stir-fry the pork.
When the pork is mostly cooked, add the cabbage, onion, and Cheongyang chilis, then stir-fry together.
Season with gochujang, soy sauce, minced garlic, and pepper.
When everything is fully cooked, serve over rice to finish.