Tips: This bean dip is ideal on crostini or as a sandwich filler. It makes enough for the Lasagna Rustica and an appetizer. Use purchased roasted garlic in a jar to save time; two tablespoons equals the pulp in one head of garlic. The spread can be made up to one week ahead, and then refrigerated in an airtight container. Note: If you don't have tahini, it can be omitted.