Crispy Chilli Beef

1️⃣ Place the steak strips in a bowl and coat with the egg.
2️⃣ Add the cornflour, salt, pepper, and white pepper; toss to coat.
3️⃣ Heat 3 tbsp of oil in a large frying pan over high heat until very hot.
4️⃣ Fry the steak in two batches until dark brown and crispy.
5️⃣ Remove the beef from the pan and set aside on kitchen roll to soak up excess fat.
6️⃣ Add remaining oil to the pan, then cook the onion for 2 minutes.
7️⃣ Add the chilli, ginger, and garlic; cook for 30 seconds.
8️⃣ Add rice vinegar, soy sauce, tomato puree, sugar, ketchup, and sweet chilli sauce to the pan; let it bubble.
9️⃣ Add the beef back to the pan; stir to coat and heat through.
🔟 Serve with rice or noodles.