Set your oven to 375°F (190°C) and coat a baking dish with nonstick spray.
Cook the diced onion in a skillet on medium heat until translucent, about 5 minutes.
Combine ground chicken, cooked onions, minced garlic, breadcrumbs, eggs, soy sauce, salt, pepper, and half the Parmesan cheese in a bowl and stir well.
Form the mixture into a loaf shape and place it in the greased baking dish.
Top the loaf with the remaining Parmesan cheese and add paprika or Italian seasoning if you like.
Bake in the oven for 45 to 50 minutes until the internal temperature hits 165°F (74°C).
Let the meatloaf rest for 10 minutes before cutting it into slices.