INGREDIENTS
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5 cups milk
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5 tablespoons butter
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1/2 cup flour
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1 1/2 cups grated Gruyere
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3 ounces fontina, cut into small chunks
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1/2 cup grated Monterey jack
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2 sliced American cheese
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3 1/2 cups grated sharp yellow cheddar
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1/2 teaspoon mustard powder
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1/4 teaspoon ground nutmeg
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Salt and pepper
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1 pound macaroni
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1/2 cup grated Parmesan