Cut the pork leg meat into bite-sized pieces.
Thinly slice the onion and green onion.
In a bowl, mix gochujang (Korean chili paste), soy sauce, minced garlic, red pepper powder, sugar, and sesame oil to make the seasoning sauce.
Add the sauce to the pork and mix well, then marinate for 20 minutes.
Heat oil in a pan and stir-fry the pork.
Add the onion and green onion, and stir-fry them together.
When the pork is fully cooked, place it on a plate.