01 - Preheat oven to 350°F. Line a loaf pan with parchment paper or lightly grease it.
02 - In a large bowl, combine the ground chicken, Parmesan cheese, onion, garlic, breadcrumbs, eggs, milk, Italian seasoning, salt, and pepper. Mix until just combined—avoid overmixing to keep the texture tender.
03 - Transfer the mixture into the prepared loaf pan, pressing gently and shaping it into an even loaf.
04 - In a small bowl, stir together the tomato sauce, olive oil, and balsamic vinegar. Spread the glaze evenly over the top of the meatloaf.
05 - Sprinkle additional Parmesan cheese over the glazed top for a golden, flavorful crust.
06 - Bake for 45 to 50 minutes, or until the internal temperature reaches 165°F and the top is golden brown.
07 - Let the meatloaf rest for 10 minutes before slicing. Serve warm, garnished with fresh herbs if desired.