Cut the beef brisket into bite-sized pieces.
Chop the onion and green onion finely.
Add cooking oil to a pan and stir-fry the brisket.
When the brisket is halfway cooked, add onion and green onion and stir-fry together.
Add rice and stir-fry until all ingredients are well mixed.
Season with soy sauce, salt, and pepper.
Finish with sesame oil and sesame seeds to taste.