Slice the beef into thin strips. Pat it dry with paper towels. Toss the beef with cornstarch until evenly coated. This helps the meat stay tender and creates a glossy sauce later.

In a small bowl, combine soy sauce, honey, brown sugar, oyster sauce, garlic, ginger, rice vinegar, sesame oil, black pepper, and water. Whisk everything until smooth. Set the sauce aside while preparing the beef.

Heat vegetable oil in a large skillet over medium-high heat. Add the beef in a single layer. Cook for about three minutes per side until browned. Avoid overcrowding the pan for the best texture.

Pour the prepared sauce into the skillet. Stir gently to coat every piece of beef. Let the sauce simmer for three to five minutes. It will become thick, shiny, and perfectly glossy.

Sprinkle sliced green onions and sesame seeds over the beef. Stir gently one final time. Remove from the heat once the sauce clings nicely to every piece of meat.

Serve the glossy sweet-savory beef immediately with steamed rice or noodles. Spoon extra sauce over the rice for even more flavor. Enjoy every warm and delicious bite with your family.