Cut the beef and vegetables into bite-sized pieces.
In a bowl, mix soy sauce, sugar, minced garlic, and sesame oil to make the marinade.
Marinate the sliced beef in the sauce for 10 minutes.
Heat cooking oil in a pan and stir-fry onions, carrots, and other vegetables.
Add the marinated beef and stir-fry quickly over high heat.
Transfer the Bichobi to a plate and sprinkle with sesame seeds to finish.