Chicken Mac and Cheese

Ingredients (18)

• 8 ounces dry elbow macaroni
• 1 tablespoon olive oil
• 1 pound boneless, skinless chicken breasts, cut into bite-size cubes
• 1/2 teaspoon kosher salt
• 1/4 teaspoon freshly ground black pepper
• 2 tablespoons unsalted butter, divided
• 1 medium yellow onion, finely chopped
• 3 cloves garlic, minced
• 3 tablespoons all-purpose flour
• 21/2 cups whole or 2% milk, warm
• pinch of nutmeg
• 1 cup shredded mozzarella cheese
• 1 cup shredded cheddar cheese
• 1/2 cup grated Parmesan cheese
• fresh herbs, for garnish, optional
• For the Breadcrumbs Topping (optional):
• 2 tablespoons unsalted butter
• 1/2 cup Panko breadcrumbs