Mix beef steak strips with marinade in a bowl and set aside for 30 minutes.
Heat oil in pan on high heat. Pan-fry beef in small batches until golden brown. Keep warm.
Mix chopped spring onions with egg. Pre-heat a frying pan to medium heat and add a quarter tablespoon of oil.
Brush one side of tortilla with egg and place in frying pan. Brush the other side with egg whilst cooking. Flip over after a minute and cook for another minute. Remove and keep warm until all tortilla has been cooked.
Serve beef strips with warm tortillas, brushing additional Lee Kum Kee (Professional) Peking Style Sauce and top with some sliced red onions and lettuce. Roll tortilla tightly and serve.
This dish is suitable for a light lunch. The sodium content is high in tortillas, so choose one that is low in sodium for a low salt diet.
You can use chicken or pork as alternative ingredients.