Cut the pork into bite-sized pieces.
Slice the onion, green onion, and carrot.
Make the sauce (gochujang, soy sauce, sugar, minced garlic, chili powder, sesame oil, pepper).
Marinate the pork with the sauce for 10 minutes.
Heat cooking oil in a pan and sauté the green onion to bring out the flavor.
Add the marinated pork and vegetables, then stir-fry.
When the pork is cooked, finish by adding sesame oil.