Black Pepper Beef Stir-Fry

Ingredients:

300g (about 10 oz) beef sirloin or flank steak, thinly sliced

2 tbsp soy sauce

1 tbsp oyster sauce

1 tsp cornstarch

1/2 tsp black pepper (freshly ground for best flavor)

2 cloves garlic, minced

1 small onion, sliced

1 bell pepper (any color), sliced

2 green onions, chopped

2 tbsp vegetable oil or sesame oil

1 tsp sugar (optional)

Salt to taste

Instructions:
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