Remove the outer layers of the garlic heads, leaving just the skin around the individual cloves. Cut off the top 1/2″ or so of whole-head to expose the garlic inside.
Place on a rimmed baking sheet and drizzle with olive oil. Use your fingers to coat the cloves. Cover with aluminum foil.
Roast for 45-50 minutes, or until the garlic begins to brown and becomes soft to the touch. Remove from the oven and let cool. When cool to the touch, gently peel the skin from the garlic cloves. Use in your favorite garlic recipe!