Cut the beef brisket into bite-sized pieces.
Wash the green onions thoroughly and cut them into 4-5 cm lengths.
Heat cooking oil in a pan and stir-fry the beef brisket over medium heat.
Once the beef is cooked, season with salt and pepper.
Add green onions and stir-fry quickly over high heat.
Add soy sauce and sugar, then stir and mix quickly.
Transfer to a plate and serve.