Ingredients A: * 1 tbsp oyster sauce * 1 tsp light soy sauce * 1 tbsp cornflour * 200g Beef tenderloin, sliced into thin pieces * 25g ginger, sliced thinly * 1/2 tsp Sugar * 1 tsp sesame oil * 1 clove garlic, minced * 2 stalks green onions, cut into 3 cms in length * 1/2 cup beef stock * salt and pepper to taste