In a large roasting pan, sprayed with cooking spray, place the turkey wings and sprinkle with the salt and pepper. Roast in the oven for 1 ½ hours until golden brown.
Place the cut vegetables, cooked wings and all the herbs in a large stockpot. Add enough water to cover the wings and vegetables.
Bring to a boil, then reduce to a simmer and cook for approximately 2 hours. Skim off the foam periodically.
Remove the wings and discard. Strain the stock and discard all the vegetables and herbs.
Let the stock cook and skim off the fat.
Use immediately or store in the refrigerator for up to a week or freeze in containers for up to 3 months.