For the Beef

• 200g Beef topside, rump, or tenderloin, sliced thinly against the grain (7.05oz)
• 1/4 tsp White pepper
• 1 tsp Chicken powder
• 2 tsp Sugar
• 1 tsp Cornstarch
• 1/4 tsp Baking soda
• 1/2 tsp Yumyum, you can buy it here, or use MSG
• 1 tsp Chinese cooking wine
• 1 tsp Sesame oil

For the Sauce

• 3 tbsp Vegetable oil
• 1/2 cup Seasoned chicken stock
• 1 1/2 tbsp Oyster sauce
• 1 tsp Soy sauce
• 1/2 tsp Dark soy
• 1 tsp YumYum, you can buy it here or use MSG

Stir-fry

• 1 stalk Spring onion, cut into 3 inch pieces
• 1/2 Onion, thinly sliced
• 1 tsp Potato starch
• 2 tbsp Water
• 2 tsp Cooking wine
• 1 tsp Sesame oil