NOTICE: PLEASE OPEN EDIT TO SEE THE CORRECT AMOUNT OF INGREDIENTS. This thick hearty vegetable and bean soup gets it intensity from pancetta, an unsmoked seasoned bacon available in Italian food stores. If necessary substitute lean slab bacon, but first simmer it in water to cover for 5 minutes, then drain, pat dry and chop. Or, for a vegetarian soup, omit the pancetta. Because the vinegar is stirred in at the end, use the best brand you can find.