Wash the beef and bean sprouts thoroughly and remove excess water.
Cut the beef into bite-sized pieces and season with salt and pepper.
Heat cooking oil in a pan and stir-fry the beef first.
When the beef is halfway cooked, add the bean sprouts and stir-fry quickly over high heat.
Add soy sauce and minced garlic to season.
Once the bean sprouts are softened, turn off the heat and transfer to a plate.