Cut the pork into bite-sized pieces.
Slice the onion and green onion thinly, and mince the garlic.
Heat some cooking oil in a pan and sauté the garlic first.
Add the pork and stir-fry until the outside is cooked.
Add the onion and green onion, then stir-fry together.
Season with soy sauce, red pepper powder, and sugar, and continue to stir-fry.
Once the pork is fully cooked, plate and serve.