Cut pork belly and vegetables into bite-sized pieces.
Prepare vegetables such as onion and green onion.
Make the sauce with gochujang (Korean chili paste), soy sauce, minced garlic, and sugar.
Heat oil in a pan and stir-fry the pork belly.
When the pork belly is half cooked, add the vegetables and stir-fry together.
Add the sauce and stir-fry, mixing well.
When all ingredients are fully cooked and seasoned, it's ready to serve.