What do you serve unexpected guests? Keep slices of a baguette in a zipper bag in the freezer and simply top them with just about anything you have to make Crostini.
http://blog.bedbathandbeyond.com/bbb-recipe/crostini-a-perfect-appetizer-for-last-minute-guests/
http://blog.bedbathandbeyond.com/bbb-recipe/crostini-a-perfect-appetizer-for-last-minute-guests/