Peel onion and then slice into 8 sections without slicing all the way through. Fan out the sections and then place on heavy duty aluminum foil sheet. Place butter in the middl of fanned out sections. pour wing sauce over the onionand then close up the foil tightly. Place over medium heat coals or at 350 degrees in oven and cook anywhere from 45 minutes to an hour depending on the size of the onion. Cook until tender. Great with grilled chicken.