Steps
1. In a small bowl, whisk together soy sauce, oyster sauce, cornstarch, and beef broth. Set aside.
2. Heat vegetable oil in a wok or large skillet over high heat.
3. Add minced garlic and cook for 30 seconds until fragrant.
4. Add beef strips and stir-fry for 2-3 minutes until browned.
5. Add sliced mushrooms and continue stir-frying for another 2 minutes.
6. Pour the sauce mixture over the beef and mushrooms, stirring well to coat.
7. Cook for an additional 2-3 minutes until the sauce thickens.
8. Season with salt and pepper to taste.
9. Serve hot over steamed rice or noodles.