Use this great recipe for roasted garlic paste when making Mario Batali's deliciousFocaccina with Roasted Garlic, Scallions and Provolone.
Preheat oven to 350 degrees.
Slice 1/3 inch from the top of the heads of garlic, exposing the cloves. Wrap each head in foil and transfer to oven. Roast until cloves are very soft, about 1 hour.
Remove from oven and let garlic cool in foil. Unwrap and squeeze garlic cloves from skins into a medium bowl. Mash using a fork.
Garlic paste can be kept covered and refrigerated for up to 1 day. Bring to room temperature before using.