The term rustic, as it relates to food, can best be described as simple and unpretentious. This soup is just that, as the primary ingredients are basic staples like onions, carrots, celery, and potatoes, items you might keep on hand. This recipe is so easy to prepare! Most of the fresh ingredients are cut into chunky pieces, which means very little mincing or dicing. The flavors and appearance of this soup are robust and full of texture and variety, certainly not fussy or fancy.