Cut the baby napa cabbage into bite-sized pieces.
Slice the duck meat into bite-sized pieces.
Julienne the onion and green onion.
Put the duck meat in a pan and stir-fry.
When the duck is partially cooked, add the baby napa cabbage, onion, and green onion.
Add soy sauce, garlic, pepper, etc., and stir-fry together.
Once all the ingredients are cooked, serve them on a plate.