Preheat the oven to 400ºF.
Cut a small square of aluminum foil. Cut the garlic head in half crosswise and place the halves on the foil. Drizzle both halves with the oil and season with salt and pepper. Bring the ends of the foil together to make a small pouch. Bake until the garlic is tender, about 45 minutes.
Remove the foil bag from the oven and carefully open it up a bit. Return to the oven for about 10 minutes more. Remove from the oven and let cool. Remove the flesh by squeezing each clove between your thumb and index finger. Use immediately or refrigerate in a little olive oil in an airtight container for 2 to 3 days.
Yield: about 2 tablespoons