Cut the pork into bite-sized pieces.
Slice the onion, green onion, and garlic.
Cut the kimchi into manageable pieces.
Heat cooking oil in a pan and sauté the green onion and garlic to bring out their aroma.
Add the pork and stir-fry until browned.
Add the kimchi and onion, and stir-fry together.
Season with chili powder, soy sauce, and sugar to taste.
Stir-fry until all ingredients are cooked through.