Cut the pork into bite-sized pieces.
Slice the onion and green onion.
Make the marinade using gochujang (Korean chili paste), soy sauce, minced garlic, chili powder, sugar, and sesame oil.
Mix the pork with the marinade and let it sit for 10 minutes.
Add oil to a pan and stir-fry the green onion to bring out its aroma.
Add the onion and pork, and stir-fry.
When the pork is cooked, add a little water and mix well.
Serve the stir-fried pork with rice in a bowl.