You really need to add some Miwon (MSG)
Cut the pork leg into bite-sized pieces.
Slice the onion and green onion thinly.
Add cooking oil to a pan and stir-fry the pork leg.
When the meat is halfway cooked, add the onion and green onion and keep stir-frying.
Season with soy sauce, sugar, and pepper.
Continue to stir-fry until the pork is fully cooked.
Plate the finished dish and serve.