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4
Easy
By Kit Chapman
Published 1989
To make the sauce, reduce the fish stock with the champagne by fast boiling and when it has almost evaporated, add the double cream. Cook this to a sauce consistency and then over very gentle heat add the butter in small knobs, whisking all the time. Remove from the heat and add the hazelnut oil and whisk vigorously to emulsify the sauce. Season with salt, pepper and lemon juice if needed. This