Separate your wings so you have the flat, drum, and tip. You can do this using a knife at the joints or you can also have the butcher at the grocery store do it for you. Discard the wing tip as there is hardly any meat on it.
Pat the wings dry using paper towels. This will help them crisp.
Add the separated turkey wings to a large zip-top bag and pour the oil in with them. Seal the bag and shake it around to coat the wings.
In a small bowl, mix all of the seasonings together them pour into the bag with the wings. Seal it again and shake around until all the wings are coated evenly. Set aside while you cut your vegetables. (For optimal flavor, leave this in the fridge over-night or at least a few hours. But if you are in a hurry, you can move on the the next step immediately.)
Cut your celery stalks and onions into large pieces and scatter them in the bottom of your baking dish. (I use a 9x13)
Pour the broth in the bottom of the pan with the vegetables.
Remove the wings from the bag and place them on top of the celery and onions in the baking dish.
Cover everything with aluminum foil and bake for 1 hour and 45 minutes. Set an alarm for 35 minutes into the baking time to turn the wings over and spoon some of the juices over them. Continue to cook, covered for the remaining time.
After the 1 hour and 45 minutes are completed, remove the dish from the oven and place the turkey wings on a clean baking sheet lined with foil.
Broil the wings uncovered for just a couple minutes on each side until both sides are browned to your liking. Be sure to watch carefully so they don't burn
Remove the wings from the oven and let rest for about 5 minutes. The internal temperature for the wings should be at least 165° to be completely cooked through.