3 Braeburn apples, peeled and sliced into 1 cm slices
1 small red cabbage (800g/1lb 12oz), core removed and shredded
1 large red onion, finely sliced
3 tbsp soft brown sugar
1 star anise
200ml/7fl oz vegetable stock
3 tbsp cider vinegar
30g/1oz butter, cubed