Cut the pork into bite-sized pieces.
Slice the onion, green onion, and carrot into pieces suitable for eating.
In a bowl, make the marinade by mixing gochujang (Korean red chili paste), red chili powder, soy sauce, sugar, minced garlic, and pepper.
Add the marinade to the pork and vegetables, and let it marinate for 10 minutes.
Heat cooking oil in a pan and first sauté the green onions to make green onion oil.
Add the pork and vegetables and stir-fry over medium heat.
Continue stir-frying until the pork is fully cooked.
Finish by drizzling with sesame oil and sprinkling sesame seeds.