01 - Preheat oven to 350°F. Line a loaf pan with parchment paper or lightly grease it.
02 - In a large bowl, combine ground chicken, Parmesan cheese, diced onion, minced garlic, breadcrumbs, eggs, milk, dried Italian herbs, salt, and black pepper. Mix until just combined, being careful not to overwork the mixture.
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 grated Parmesan cheese over the glazed surface.
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.