Preheat oven to 350 degrees F.
Line a sheet pan with foil. Place an oven-safe cooling rack on top of the baking sheet. Lightly oil the cooling rack.
In a large bowl, combine the grated onion and zucchini, bread crumbs, cottage cheese, egg, lemon juice, 1 teaspoon of salt, garlic salt, parsley and pepper. Stir with a fork to combine.
Add the ground turkey to the bowl. Use a spatula or your hands to mix the turkey with all the other ingredients.
Shape the meat into a loaf on a clean cutting board. Carefully transfer the meatloaf to the prepared pan.
Bake the meatloaf for 90 minutes. Remove the meatloaf from the oven. Increase the oven temperature to 450 degrees.
Stir together the ketchup, brown sugar, apple cider vinegar and remaining 1/2 teaspoon of salt.
Pour the sauce evenly over the meatloaf.
Return the meatloaf to the oven and bake for an additional 20 minutes, or until the internal temperature of the meatloaf reaches 165 degrees F.