2 large floury potatoes, cut into 1.5cm/陆in thick long chips
陆 lemon, juice only
2 tbsp chopped parsley
salt and freshly ground black pepper
1 shallot, finely chopped
陆 tsp English mustard
275ml/10fl oz fish stock
vegetable oil, for deep-frying
25g/1oz butter
110ml/4fl oz double cream
20g/戮oz fresh parmesan, grated
1虫750驳/1陆濒产 lobster, cooked
55ml/2fl oz white wine