3 Cox's apples, peeled
1 large celeriac
1 large onion
250g/9oz rocket leaves
陆 tsp Dijon mustard
salt and freshly ground black pepper
2 tbsp extra virgin olive oil
3 tbsp extra virgin olive oil
2 tsp vegetable oil
1 tbsp white wine vinegar
150g/5oz butter, plus extra for the sauce
4 pork chops
425ml/戮 pint London Pride ale (or similar)