Cut the pork into bite-sized pieces.
Slice the onion, green onion, and carrot into thin strips.
In a bowl, mix gochujang, soy sauce, red pepper powder, sugar, and minced garlic to make the marinade.
Add the marinade to the pork and let it sit for 10 minutes.
Heat cooking oil in a pan and stir-fry the green onion to make scallion oil.
Add the pork and vegetables to the pan and stir-fry over high heat.
When the pork is fully cooked, sprinkle sesame seeds to finish.