The season of relaxed entertaining is upon us, and it's time to let go of your favorite crostini recipe. And so we bring you a flashy new appetizer -- one that will kick off a party with heart-thumping flavors, invite ice-breaking questions (are those fossils? how do I eat them?), and break down any notions of proper etiquette (spoiler: everyone's fingers are going to get salty -- no frilly toothpicks allowed!). It comes from José Pizarro's Spanish Flavors, a handsome book on the cuisines of five regions of Spain. As Food52er shovel2spoon explained to me, "This recipe transforms plain boiled potatoes into a tapas quality dish.".