Preheat oven to 400°F. Cut a quarter of the top of a head of garlic. Place in tin foil and lightly drizzle with olive oil, about 1 tablespoon. Completely close foil to cover garlic. Place in oven for 30 min. When cooked, open foil and let cool for 15 min so you can squeeze out the cloves. You'll only need about 5 to 6 cloves.