Preheat your oven to 350 degrees F / 175 degrees C, grease a 9x5 inch loaf pan and line it with parchment if desired.
In a large mixing bowl, combine the ground chicken with all of the meatloaf ingredients. Mix with your hands or a spoon until just incorporated.
Transfer the mixture to the prepared loaf pan. Press between the loaf and the pan to gently form a rounded top.
Whisk together the ketchup, brown sugar, and apple cider vinegar in a small bowl to make the glaze.
Brush half of the glaze over the top of the meatloaf and bake for 45 minutes.
Top with the remaining glaze and cook for another 15 minutes or until the meatloaf has reached 165 degrees F / 74 degrees C when checked with a digital thermometer.
Let the chicken loaf rest for 15 minutes then remove from the pan, slice and serve.