4 medium potatoes (preferably Maris Piper or King Edward), cut into 1cm/陆in and place in a bowl of cold water
1 garlic clove, finely chopped
handful flat-leaf parsley, finely chopped
8 leaves sage, deep-fried for one minute until crisp
陆 shallot, finely chopped
2 tbsp Dijon mustard
1 tsp coarsely ground black pepper
2 pinches freshly ground black pepper
2 tbsp rapeseed oil
1 pinch sea salt
2 pinches sea salt
20g/陆oz unsalted butter
2 pork chops on the bone, 3cm/1in thick