Clean bean sprouts and beef thoroughly.
Add cooking oil to a pan and stir-fry the beef.
When the beef is about halfway cooked, add bean sprouts and stir-fry together.
Add seasonings such as soy sauce, sugar, and minced garlic, and continue stir-frying.
Once all ingredients are cooked, drizzle sesame oil and mix well to finish.
Plate and sprinkle sesame seeds on top to serve.