01 - In a medium bowl, whisk together soy sauce, beef broth, oyster sauce, brown sugar, rice vinegar, and sesame oil until fully combined and sugar dissolves.
02 - Stir in the minced garlic and fresh ginger, incorporating evenly throughout the sauce mixture.
03 - In a small bowl, mix cornstarch and cold water until smooth and lump-free, ensuring proper thickening consistency.
04 - Pour the slurry into the sauce mixture while whisking continuously. Pour sauce over cooked beef and broccoli in the pan, stirring and simmering for 2-3 minutes until sauce thickens and coats ingredients evenly.