Aluminum foil or a garlic roaster
If using foil, lay flat a square large enough to completely wrap around the garlic head. Bend up the sides to make a bowl shape.
Remove as much of the paper skin as you can without taking apart the head
Cut off the tips - not the root end! - of the cloves
Put a teaspoon of water in the roaster (or foil bowl.)
Place the head root end down in the water.
Drizzle oil over head. Sprinkle the tiny bit of salt.
Place in cold oven; turn up to 400°. Roast for 45 minutes
Remove from oven. Scoop soft cloves out with tip of knife to spread on bread, or use in dressings or sauces.