INGREDIENTS
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1 pound uncooked medium-sized pasta shells
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6 tablespoons (3/4 stick) butter
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6 tablespoons all-purpose flour
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3 cups milk
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1/2 teaspoon salt
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1/2 teaspoon black pepper
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1 1/2 cups (6 ounces) shredded Swiss cheese
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1 (14-1/2-ounce) can stewed tomatoes
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12 ounces medium-sized shrimp, cooked, peeled, and deveined
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1 (10-ounce) package imitation crabmeat, flaked