If Brussels sprouts are mini cabbages, then endive is mini lettuce.  I found a recipe in a finger food cookbook—endive made lettuce wraps into hors d’oeuvres.  The recipe called them “Witlof heads,” but that certainly wasn’t what they were called in the store.  They were a bit pricey for the volume considering they really do taste just like regular lettuce (at least to me).  But this is about variety, not necessarily cost-effectiveness, right?