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1
Preheat oven to 350F Generously grease an ovenproof casserole dish with 1 tablespoon of the butter.
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2
Lay in the fish, skin side down.
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3
In a saucepan over medium heat, melt the remaining butter, add leeks and cook gently until the leeks begin to soften, 3 to 5 minutes.
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4
Stir in the flour and cook until smooth, another 1 to 2 minutes.
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5
Whisk in the milk and cream, add the bay leaf and parsley, and bring to a boil, stirring continuously.
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6
When sauce is smooth, remove from heat and spoon over the fish.
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7
Cover with aluminum foil and bake for about 25 minutes.
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8
Remove from oven,discard the bay leaf, sprinkle cheese over the fish and place under the broiler until browned.
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9
Garnish with parsley sprigs.
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10
Serve with boiled potatoes and a fresh green vegetable or salad.
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11
Variations:.
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12
For a fish bake with spinach, layer 1 pound of fresh spinach, steamed for 1 to 2 minutes in 2 tablespoons of water, over the haddock and cook as above.
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13
For a fish bake with potato crust, bake as above for 15 minutes, omit the grated cheese, add a layer of mashed potatoes and return to oven for final 10 minutes.
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14
Place under the broiler until browned.