Recipe for Chinese-style Beef and Onion Stir-Fry:

Recipe for Chinese-style Beef and Onion Stir-Fry:
### Ingredients:
– **For the beef and vegetables:**
– 500 g beef (sliced thinly)
– 2 large onions (sliced)
– 2 cloves garlic (minced)
– 1 red bell pepper (sliced, optional)
– 1 carrot (julienned, optional)
– 150 g mushrooms (sliced, optional)
– 2-3 scallions (sliced, white and green parts separated)
– Vegetable oil for cooking
– **For the sauce:**
– 3 tbsp soy sauce
– 2 tbsp oyster sauce (or hoisin sauce)
– 1 tbsp rice vinegar (or white vinegar)
– 1 tbsp sugar
– 1 tbsp cornstarch (to thicken the sauce)
– 1/2 cup (125 ml) beef broth or water
– Ground black pepper, to taste
#:## Instructions