Cut the pork into bite-sized pieces.
Slice the onion, green onion, and carrot into thin strips.
Make the marinade with gochujang (Korean red chili paste), gochugaru (Korean chili flakes), soy sauce, sugar, minced garlic, and other seasonings.
Add the marinade to the pork and let it marinate.
Heat oil in a pan and stir-fry the pork.
Add the vegetables and stir-fry together.
Turn off the heat once all ingredients are cooked.