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Preheat oven
to 425. |
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Coat an 8 x 11.5
inch baking dish (2 quart capacity) with cooking spray. Sprinkle baking
dish with lemon zest. |
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Whisk 1/4 cup
milk and flour in a small bowl until smooth. |
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Heat remaining
1 1/2 cups milk in a heavy saucepan over medium heat until steaming. |
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Add flour mixture
and cook, whisking contantly, until sauce bubbles and thickens, 2-3
minutes. Remove from heat. Stir in 1/2 cup Parmesan, pepper and cayenne. |
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Meanwhile, cook
spinach acording to package directions. Drain and refresh under cold
running water. Press out excess moisture. |
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Spread spinach
over bottom of prepared baking dish. Place fish fillets, slightly
overlapping, over spinach. |
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Sprinkle with
lemon juice. Spoon cheese sauce evenly over fish. Sprinkle remaining
2 Tbsp Parmesan over sauce. |
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Mix bread crumbs
and oil in a small bowl; sprinkle over top of sauce. |
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Bake until golden
and bubbly and fish flakes when poked with a small sharp knife, 30-35
minutes. |