INGREDIENTS
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kosher salt
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1 large head cauliflower, cut into small florets
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1 lb. Macaroni
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5 tbsp. unsalted butter, divided
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1/2 c. panko breadcrumbs
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1/4 c. chopped parsley
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3 tbsp. all-purpose flour
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Freshly ground black pepper
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1 1/2 c. whole milk
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2 c. shredded Parmesan, plus more for garnish
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1 lb. mozzarella, torn into small pieces