If you're throwing a holiday party and need some appetizer ideas, rather than putting out the tried-and-true Chex Mix and guacamole, why not try something entirely new? I did, when I brought these blue cheese walnut amuses-bouche to my holiday party this year. The bread, when buttered and toasted, takes on the crispy, airy consistency of a cheese puff, which is a perfect foil for the brandy, mustard, and blue cheese topped with walnuts.