6 green asparagus, trimmed and peeled
6 white asparagus, trimmed and peeled
2 tbsp edible flowers, such as borage, garlic or chive, to garnish
1 garlic clove, finely sliced
1 lemon, juice only, to taste
2 oranges, 1 peeled and julienned and 1 juice only
1 shallot finely sliced
salt and freshly ground black pepper
100ml/3陆fl oz fish stock
200g/7oz butter
4 free-range egg yolks
2 halibut fillets, each about 175g/6oz
4 tbsp dry sherry