"This Serbian / Croatian soup is a made with meaty lamb bones and the ever-present trinity of green peppers, onions and tomatoes and then creamed. After platters of sausages and peppers are passed, it's often the first course of a splendid Easter feast. The soup can also be made with meaty bones leftover from a lamb meal or spit-roasted lamb, although the flavor will be somewhat different. Freeze leftover egg whites and save for leftover egg white recipes ...."