Place whole heads of garlic, prepared as for roasted garlic, on a
sheet of heavy-duty foil.
Top with butter (4 tb per 8 heads) and a few sprigs of fresh
rosemary or oregano. If fresh herbs are unavailable, substitute
dried (2 ts of dried herbs for 8 heads of garlic). Fold the foil
over the garlic and seal the package well.
Cook over hot coals for about 45 minutes, turning the package
occasionally with tongs.