Cut the pork into bite-sized pieces.
Prepare vegetables such as onion, green onion, and carrot.
Make the sauce by mixing soy sauce, gochujang (Korean chili paste), minced garlic, sugar, sesame oil, and black pepper.
Combine the pork, sauce, and vegetables, and marinate for 20 minutes.
Add oil to a pan and stir-fry the pork and vegetables over medium heat.
When the pork is cooked, finish by sprinkling with sesame seeds.