My favorite soups are all, without question, the ones that come out of impromptu improvisation. I think soup, as a dish, is better suited to experimentation and discovery than any other, perhaps because the basic technique of making a soup is so simple and intuitive. It lets the improvisational cook follow her whim (I've a craving for sausage...), building flavor in seemingly strange ways (let's have some lemon here!), using up pantry leftovers (hi there, half-empty can of beans...) and bringing it all together in one wholly satisfying yet personal dish.
That's how this soup happened. And even though it was built from my own idiosyncrasies, it turned out too good not to share (if I do say so myself!).