For the Sauce:
- 3 tablespoons soy sauce
- 1 tablespoon oyster sauce
- 1 tablespoon hoisin sauce
- 1 teaspoon sesame oil
- 1 teaspoon sugar
- 1/2 cup (120ml) beef broth or water
- 1 teaspoon cornstarch (mixed with 2 tablespoons water for a slurry)
For Cooking:
- 2 tablespoons vegetable oil (for stir-frying)
- Optional garnish: sliced green onions or sesame seeds