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1
Preheat oven to 375 degrees F.
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2
Cook macaroni according to package directions.
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3
Drain and set aside.
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4
Cut shrimp crosswise into thirds.
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5
In a medium frying pan, over medium heat, melt 2 tablespoons butter.
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6
Add garlic, and cook until translucent.
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7
Stir in the onion and celery, and cook, stirring occasionally, until translucent.
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8
Add shrimp, 1 teaspoon salt, chives and pepper.
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9
Mix thoroughly, reduce heat and cover.
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10
Cook for 10 to 12 minutes until the shrimp are cooked through.
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11
Drain and reserve liquid.
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12
In a medium saucepan, melt 2 tablespoons butter over low heat.
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13
Stir in cornstarch/water mixture, nutmeg, and remaining 1 teaspoon salt.
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14
Gradually stir in half-and-half; cook and stir until mixture thickens slightly and bubbles.
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15
Remove from heat.
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16
Add half the colby cheese and 1 cup of the cheddar.
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17
Stir until melted; then add remaining colby cheese.
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18
Continue to stir until mixture is smooth.
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19
Add reserved liquid from shrimp and continue to stir until mixture is well combined.
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20
Grease a 2-quart casserole with remaining tablespoon butter.
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21
In large bowl combine shrimp and cooked macaroni; add cheese sauce and mix thoroughly.
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22
Pour mixture into casserole dish and stir in the egg.
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23
Bake 35 to 40 minutes or until lightly browned and bubbly.
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24
Remove from the oven and sprinkle with remaining 1 cup of cheddar cheese.
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25
Return to the oven and bake until cheese is melted.
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26
Remove from oven and sprinkle with paprika.
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27
Let stand 10 to 15 minutes before serving.