INGREDIENTS
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1 stick unsalted butter
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Kosher salt
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1 pound elbow macaroni
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1 small onion finely chopped
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2 stalks celery finely chopped
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3 cups cooked chicken
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2 cloves garlic minced
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3/4 cup franks hot sauce
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3 tablespoons all-purpose flour
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2 teaspoons dry mustard
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2 1/2 cups half-and-half
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3 ½ cups sharp cheddar cheese
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2 cups pepper jack cheese
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1 cup panko breadcrumbs