No-Bake Crispy Potato Chip Mac and Cheese
Ingredients:
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1 cup elbow macaroni, uncooked
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1 (8 ounce) bag white cheddar kettle-style potato chips, crushed into medium-fine crumbs
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⅓ cup finely grated Parmigiano-Reggiano
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2 tablespoons plain dry bread crumbs
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1 tablespoon butter
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4 cups prepared white sauce (see footnote)
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½ pound shredded extra-sharp Cheddar cheese
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¼ pound shredded Gruyere cheese
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¼ teaspoon dry mustard