Cut the ribs into bite-sized pieces.
Soak the ribs in cold water to drain the blood.
In a bowl, mix gochujang, soy sauce, sugar, minced garlic, and sesame oil to make the marinade.
Add the marinade to the ribs, mix thoroughly, and marinate for 30 minutes.
Heat cooking oil in a pan, add the marinated ribs, and cook over medium heat.
When the meat is almost cooked, add green onion and onion, and stir-fry together.
Once the sauce thickens and the meat is fully cooked, plate and serve.