Mac and Cheese Two Ways

INGREDIENTS

• 2 cups whole milk
• 8 ounces shredded mozzarella
• 1/2 cup half-and-half
• About 20 grinds black pepper
• 3 tablespoons butter
• 8 ounces shredded sharp Cheddar
• 1 pound penne pasta
• 3 tablespoons all-purpose flour
• Salt
• 4 ounces grated Pecorino Romano