Braised halibut with maltaise sauce and asparagus

By Michel Roux Jr. From Saturday Kitchen Ingredients 2 halibut fillets, each about 175g/6oz 1 garlic clove, finely sliced 1 shallot finely sliced 4 tbsp dry sherry 100ml/3½fl oz fish stock 200g/7oz butter 4 free-range egg yolks 2 oranges, 1 peeled and julienned and 1 juice only 1 lemon, …