1. Slice the onion into thin 0.5cm strips. Cut the green onion diagonally into 0.5cm-thick, 4–5cm-long pieces.
2. Cut the beef for bulgogi into 4–5cm pieces. Add Sempio Joseon Bulgogi Sauce and mix for 1 minute.
3. Add the prepared vegetables to the beef and toss until the sauce is evenly distributed.
4. Heat a pan over medium heat. Add the seasoned beef and vegetables, then stir-fry for 7–10 minutes until the beef is fully cooked and the onion turns translucent.