Trim the tops of the garlic off so that the majority, if not all, of the cloves are exposed, about 1/3 of the way down. Set tops aside for later use (see garlic butter recipe below). Place the heads of garlic on a sheet of aluminum foil. Smear the butter over the exposed cloves, drizzle with olive oil, season with the salt and pepper and place the thyme on top. Roll the foil up over the garlic and pinch the ends of the rolls. Place in the front corner of the oven. It’s best to roast the garlic when your fire is starting and the hearth is approximately 350 – 400 degrees and the dome 600-700 degrees. At that temperature, the garlic takes 20-30 minutes. Remove the foil pack with garlic from the oven and unroll the foil. Garlic should be a deep golden color and soft to the touch.