Preheat your oven to 375°F (190°C). Line a baking sheet with parchment or lightly grease a loaf pan for a cleaner bake.
In a large bowl, combine the ground chicken, bread crumbs, parmesan, milk, egg, minced onion, garlic, tomato paste, Worcestershire, thyme, and a pinch of salt and pepper. Mix gently with a fork or your hands until just combined; overmixing can make the meatloaf dense.
Shape the mixture into a loaf about 9 by 4 inches on the prepared sheet or pan. If using a loaf pan, place it in the pan with any excess mixture around the sides.
Bake the loaf for 25 minutes. While it bakes, whisk together the glaze ingredients: ketchup, honey, and soy sauce.
Remove the loaf from the oven and spoon or brush the glaze over the top, reserving a small amount for later. Return to the oven and bake for another 15–20 minutes, or until the internal temperature reaches 165°F (74°C) and the glaze is glossy and slightly caramelized.
Let the meatloaf rest for 5–10 minutes before slicing. This helps it hold together and makes slicing easier.
Slice and serve with extra glaze on the side, if desired. This pairs nicely with mashed potatoes, green beans, or a simple salad.