Cut the duck meat into bite-sized pieces.
Prepare vegetables such as onion, green onion, and garlic.
Make the sauce with gochujang (red chili paste), soy sauce, sugar, minced garlic, etc.
Mix the duck meat with the sauce.
Heat oil in a pan and stir-fry the duck meat.
Add the prepared vegetables and stir-fry together.
When everything is cooked, serve on a plate.