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