Cut the pork into bite-sized pieces.
Slice onion, green onion, and carrot thinly.
Make the marinade by mixing gochujang (Korean chili paste), soy sauce, minced garlic, sugar, and chili powder.
Add the marinade to the pork and mix well.
Heat cooking oil in a pan and stir-fry the green onion to bring out the aroma.
Add the pork and vegetables to the pan and stir-fry together.
Stir-fry over high heat until the pork is fully cooked.
Finish with sesame oil and black pepper.