Macaroni and Cheese

INGREDIENTS

• 2 1/2 cups whole milk
• 3/4 cup (packed) finely grated Parmesan
• 2 cups (packed) grated Fontina
• Butter, for greasing dish
• 3/4 cup (packed) grated mozzarella
• 1/4 teaspoon freshly ground black pepper
• 4 ounces cooked ham, diced, optional
• 12 ounces wide egg noodles
• 2 tablespoons finely chopped fresh Italian parsley leaves
• 1/2 teaspoon salt, plus more for pasta water
• 2 teaspoons all-purpose flour
• 2 cups heavy cream