Spicy Tuscan Borlotti Bean, Tomato and Cavolo Nero Soup

During the summer months, when it rains in Assisi, it pours. Literally. Narrow Medieval streets turn into warm fast-moving rivers as the water gushes down from the top of the hilltop town to the very bottom. I remember very clearly once standing atop the Rocca Maggiore, the ruined castle which has dominated, for more than eight…