Clean and prepare the bean sprouts and beef.
Make the sauce (soy sauce, minced garlic, red pepper powder, sugar, sesame oil, black pepper).
Stir-fry the beef first in a pan.
When the meat is cooked, add the bean sprouts and stir-fry.
Add the sauce and stir-fry until all ingredients are cooked through.
Finish by sprinkling green onion and sesame seeds on top.