Steps

• Start by slicing the beef sirloin into thin strips. Place the sliced beef in a mixing bowl, add some salt and pepper to taste, and set aside.
• In a small bowl, mix together soy sauce, oyster sauce, and cornstarch dissolved in water. Stir until fully combined.
• Heat the vegetable oil in a large skillet over medium-high heat. Add minced garlic and sauté until fragrant, then add beef slices. Cook until browned and cooked through, approximately 3–5 minutes.
• Remove beef and set aside. Add broccoli to the skillet and stir-fry until vibrant green and tender, about 3 minutes.
• Return beef to the skillet, pour in the sauce, and stir. Cook for 2–3 minutes until the sauce thickens and coats the ingredients. Serve immediately.