Stuff onion with butter, the amount of garlic or garlic powder you prefer
Sprinkle with salt and pepper to taste
Place onion on sheet of aluminum foil
Drizzle with Balsamic Vinegar
Replace onion top to cover
Wrap in foil
Place on heated grill for 1-1 1/2 hours in indirect heat
Sprinkle with salt and pepper to taste
Place onion on sheet of aluminum foil
Drizzle with Balsamic Vinegar
Replace onion top to cover
Wrap in foil
Place on heated grill for 1-1 1/2 hours in indirect heat