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1
First make cheese sauce.
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2
Melt butter in a medium saucepan over medium high heat.
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3
Add onion and cook until soft but not browned.
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4
Add flour and cook 1 minute stirring constantly.
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5
Remove from heat and season with salt and pepper.
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6
Gradually add milk while stirring constantly until mixture is completely smooth.
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7
Return to heat and cook, stirring, until mixture thickens.
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8
Reduce heat and simmer 3 minutes stirring constantly.
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9
In a small bowl, beat egg yolk.
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10
Stir in about 1/2 of the hot sauce and mix well.
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11
Stir egg yolk mixture and the cheese into hot sauce.
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12
Cook over low heat stirring constantly until cheese melts and mixture thickens.
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13
DO NOT BOIL.
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14
Preheat oven to 375.
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15
Butter or spray a 9 x 13 pan.
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16
Microwave frozen broccoli until almost done.
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17
Rinse and pat dry fish fillets.
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18
Cut fillets into two or three pieces.
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19
Brush fillets with lemon juice and sprinkle with salt and pepper.
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20
Arrange broccoli spears in bottom of buttered pan.
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21
Top with fish fillets and pour sauce over all.
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22
Sprinkle with remaining 1/4 c.
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23
cheese.
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24
Bake 20 to 25 minutes and then briefly put under broiler until top is brown (watch carefully).