Preparation Instructions: In large heavy skillet cook
mushrooms and shallots in butter over moderate heat. Stirring, for 5 minutes. Add fish stock and wine and bring liquid to simmer. Add fish fillets and poach 3 minutes on each side, until they just flake when tested with a fork. Transfer fish and mushrooms with slotted spatula to heated platter. Over high heat, reduce poaching liquid by two thirds, add half and half, and again reduce by half. Add Pernod and bits of cold butter. 1 piece at a time, whisking well after each addition and adding
next piece before preceding one is completely melted. Season sauce with salt and white pepper and pour over fish.