Remove the loose papery layer from the garlic bulbs. Leave some on for the roasting process.
Lay bulbs sideways and slice off the tips of the garlic cloves (not at the root end).
Place garlic cloves root side down onto a large piece of aluminum foil. Drizzle cut side of bulbs with olive oil.
Close up aluminum foil around the garlic bulbs and place on a baking sheet. Bake in the oven for 45-60 minutes.
Notes
We roasted our bulbs for 60 minutes to get a soft paste consistency. Depending on your desired consistency, you can roast the garlic for closer to 40-45 minutes as well. The bulbs are done roasting when they are golden on top and easily pierced with a fork or knife.
The olive oil helps retain moisture so the bulbs don't end up dry or brittle. Simply drizzle it on top of the cut side of the bulbs before roasting.