1 bunch asparagus
1 lemon slice
陆 lemon, juice only
handful of fresh green herbs, such as flatleaf parsley, fennel, thyme or bay leaves
1 tbsp finely chopped banana shallot
few wild garlic leaves, roughly chopped
splash olive oil
500g/1lb 2oz salt
1 tsp white peppercorns
sea salt and ground white pepper
100ml/3陆fl oz white wine vinegar
200g/7oz butter, chilled and chopped
2 tbsp double cream
2 large free-range egg whites
800g/1lb 12oz sea bass, gutted, fins and scales removed
240ml/8戮fl oz white wine