Crispy Chilli Beef

Ingredients:

360 g thin-cut sirloin steaks, cut into thin strips

1 small egg

4 tbsp cornflour (cornstarch)

¼ tsp salt

¼ tsp black pepper

⅛ tsp white pepper

4 ½ tbsp sunflower oil, divided

1 medium onion, sliced into thin strips

1 red chilli, finely sliced

1 tsp minced ginger

3 garlic cloves, minced

2 tbsp rice vinegar

3 tbsp dark soy sauce

2 tbsp tomato puree (paste)

6 tbsp caster sugar

2 tbsp tomato ketchup

2 tbsp sweet chilli sauce

Instructions: