Preheat the oven to 375 degrees.

Cut the top third of the garlic head off so that the tops of the cloves are exposed. Place the garlic head, unpeeled, in a small ovenproof dish and drizzle with the oil. Cover with aluminum foil and bake for 30 minutes.

Uncover and bake until garlic is soft and golden brown, another 30 to 40 minutes. If not using immediately, let cool, then store in an airtight container in the refrigerator for up to 5 days.