Air fryer crispy chilli beef

Name: Air fryer crispy chilli beef
Ingredients: 4 x 150g/5½oz minute beef steaks, very thinly sliced into strips; 1 tbsp soy sauce; 2 peppers, red or yellow, seeds removed and cut into chunks; 2 onions, cut into 2cm/¾in chunks; 1 red chilli, seeds removed, sliced; 1½ tbsp vegetable oil; 3 tbsp cornflour; 2 tsp Chinese five-spice powder; 2 spring onions, sliced on an angle, to serve; freshly cooked rice or noodles, to serve (optional); 2 tbsp sesame seeds (a mix of black and white, or whatever you have); 5 tbsp white wine vinegar; 1 tbsp balsamic vinegar; 2 tbsp light soy sauce; 2 tbsp light brown sugar; 2 tbsp tomato ketchup