Preheat oven to 400°F (200°C)
Cut the top off a head of garlic to expose the cloves
Place garlic on a sheet of foil or in a small baking dish
Drizzle with olive oil (about 1–2 tbsp per head)
Sprinkle with salt and black pepper (optional)
Wrap tightly in foil
Bake 35–45 minutes, until cloves are soft and golden
Carefully unwrap foil (steam will be hot)
Let cool 5–10 minutes
Squeeze roasted garlic cloves out of the papery skins
Serve immediately or store in an airtight container in the refrigerator up to 5 days