How to roast whole garlic bulb :Peel away the outer layers of the garlic bulb skin, leaving the skins of the individual cloves intact. Using a knife, cut off 1/4 to a 1/2 inch of the top of cloves, exposing the individual cloves of garlic.Place the garlic heads in a baking pan; muffin pans work well for this purpose. Drizzle a couple teaspoons of olive oil over each head, using your fingers to make sure the garlic head is well coated. Cover with aluminum foil. Bake at 400°F for 30-35 minutes, or until the cloves feel soft when pressed.