Heat oven to 400° F.
Slice off the top of the garlic head with a sharp knife to expose the cloves.
Place the garlic on a square of aluminum foil. Sprinkle with the wine, thyme, salt, and pepper. Fold foil to seal. Place in a garlic roaster or wrap entirely in more foil and bake 45 minutes.
Unwrap and let cool. Squeeze the soft garlic cloves from their skins. Spread on slices of crusty bread.