Using a medium sized roasting pan, place the onion, carrot, celery, and water with the turkey legs on top. Cover with foil tightly and roast in a 350 degree oven for 90 minutes. Pre-heat your char grill. Season the turkey legs, then char grill and lather the Sweet Baby Rays Golden BBQ Sauce on the turkey legs as they cook. Once the sauce has set and caramelized slightly, serve.