Cut the pork leg and kimchi into bite-sized pieces.
Heat cooking oil in a pan and stir-fry the pork leg.
When the meat is halfway cooked, add kimchi and onion, then stir-fry.
Add gochujang (red chili paste), soy sauce, minced garlic, and red chili powder. Continue stir-frying.
Stir-fry over medium heat until all ingredients are fully cooked.
Finish by drizzling sesame oil and sprinkling sesame seeds.