Preheat your oven to 350°F (175°C). Prepare a loaf pan by greasing it lightly or lining it with parchment paper for easy release after baking.
In a spacious mixing bowl, combine ground chicken, breadcrumbs, grated Parmesan cheese, chopped parsley, minced garlic, and finely chopped onion. Stir until ingredients are evenly distributed.
In a smaller mixing bowl, whisk together the beaten egg, milk (or chicken broth), Worcestershire sauce, a pinch of salt, pepper, dried oregano, and dried thyme until the mixture is smooth and well blended.
Gradually pour the egg mixture into the bowl with the chicken mixture. Use your hands or a spatula to gently mix everything together until just combined. Be careful not to overmix to maintain the meatloaf's tenderness.
Transfer the combined mixture into the prepared loaf pan, shaping it while packing it down gently to form a uniform loaf. Spoon the marinara sauce over the top, ensuring even coverage.
Place the loaf pan in the preheated oven and bake for 45 to 55 minutes. The meatloaf is done when its internal temperature reaches 165°F (74°C) and the center is no longer pink.
After baking, remove the meatloaf from the oven and allow it to rest in the pan for about 10 minutes. This resting period helps it hold its shape when sliced.
To serve, slice the meatloaf and plate it alongside a drizzle of additional marinara sauce if desired, enhancing the flavor and presentation.
Notes
Let the meatloaf rest before slicing for better shape.