01 -
Place the steak strips in a large bowl, add the egg, and mix thoroughly to coat all pieces.
02 -
Add cornflour, salt, black pepper, and white pepper to the beef. Toss to evenly coat; the mixture will be sticky.
03 -
Heat 3 tablespoons of sunflower oil in a large frying pan or wok over high heat until shimmering. Add half the beef strips individually, spreading them out.
04 -
Fry the beef until dark brown and crispy, approximately 5–6 minutes, stirring only 3–4 times. Remove with a slotted spoon to a bowl lined with paper towel.
05 -
Add 1 tablespoon of oil and repeat the frying process with the remaining beef. Transfer to the lined bowl once finished.
06 -
Reduce heat to medium and add the remaining 0.5 tablespoon oil. Sauté the onion for 2 minutes until slightly softened.
07 -
Incorporate sliced red chilli, minced ginger, and minced garlic. Stir-fry for 30 seconds until fragrant.
08 -
Pour in rice vinegar, dark soy sauce, tomato puree, caster sugar, tomato ketchup, and sweet chilli sauce. Increase heat and simmer until slightly reduced, about 2 minutes.
09 -
Return the crispy beef to the pan. Toss to coat and heat through for 1–2 minutes until beef is hot.
10 -
Serve immediately with steamed rice or noodles, as desired.