1 Braeburn apple, peeled
2 sticks celery, thinly sliced
2 onions, roughly chopped
small bunch fresh sage
2 x 400g/14oz cans butterbeans in water, rinsed and drained
100ml/3陆fl oz strong, good quality chicken stock
1 tbsp wholegrain mustard
salt and freshly ground black pepper
1 tsp cornflour mixed with 1 tbsp cold water until smooth
1 tbsp olive oil
30g/1oz butter
4 thick pork shoulder steaks
400ml/14fl oz dry cider