Cut the pork into bite-sized pieces.
Slice the onion, green onion, and carrot into thin strips.
In a bowl, combine gochujang, soy sauce, sugar, minced garlic, red pepper powder, and sesame oil to make the sauce.
Add the sauce to the pork and vegetables and mix well.
Heat cooking oil in a pan and stir-fry the marinated pork and vegetables.
Cook over medium heat until the pork is fully cooked.
Finish by sprinkling sesame seeds on top.