-
1
Make Hollandaise: In double boiler top with wire whisk, slightly beat egg yolks. Slowly beat in melted butter. Cook, stirring, over hot water (water in base should not touch upper pan) just until thick. Mixture will curdle if cooked too long. Whisk the heavy cream into sauce. Gradually beat in lemon juice and 1/4 teaspoon salt. Beat until as thick as mayonnaise. Set aside to cool.
-
2
Preheat oven to 350u00b0F.
-
3
Gently rinse fillets and pat dry with paper towels. Place dark side up on board. Sprinkle fillets with 3/4 teaspoon salt and dash of pepper. Dot with 2 tablespoons butter.
-
4
Starting at narrow end, roll up fillets. Secure with toothpicks. In buttered shallow baking dish, stand fillets upright on even sides. Pour water and white wine over fish. Top with sliced onion and bay leaf.
-
5
Bake, uncovered, 15 minutes or until fish flakes when tested with fork. Remove bay leaf and onion. Remove fillets to oven-proof platter and keep warm. (Leave the oven on; you'll be broiling these soon.) Remove toothpicks gently; fish is fragile. Strain fish stock, reserving 1 1/4 cups liquid.
-
6
Melt 3 tablespoons butter in saucepan. Remove from heat. Stir in flour and dash cayenne until smooth. Gradually stir in fish stock and bring to boil, stirring. Reduce heat and simmer 3 minutes. Stir in light cream and mix well. Pour over fish.
-
7
Increase oven temperature to broil.
-
8
Melt remaining 2 tablespoons butter and saute mushrooms. Add lemon juice and salt. Cook until tender. Spoon mushrooms around fish. Pour Hollandaise sauce over fillets. Broil 4 inches from heat source until golden brown. Garnish with parsley or watercress.
