Cut the pork into bite-sized pieces.
Julienne the onion, green onion, and carrot.
Make the marinade with gochujang (Korean red pepper paste), soy sauce, sugar, minced garlic, and red pepper flakes.
Add the marinade to the pork, mix well, and let it marinate for 20 minutes.
Heat cooking oil in a pan, then add the pork and vegetables and stir-fry.
Once everything is cooked, finish with a drizzle of sesame oil and a sprinkle of sesame seeds.