Minestrone Soup with Tuscan Sausage and Arugula Pesto

Minestrone has a long history in Italian cuisine and, not surprisingly, many interpretations. Old tales recount how Roman soldiers lived on a diet of minestrone and chickpeas, a strange assertion since many of the soup’s classic ingredients—tomatoes, potatoes, beans—are New World foods that were not available at the time. By the end of the sixteenth century, the core concept had become a tasty mixture of vegetables, including dried beans, with pasta and/or potatoes. If you can find them, use borlotti (cranberry) beans, a specialty of Tuscany. Swirling a pesto of arugula, rather than the more prosaic basil, into the minestrone imparts a refreshing change. Other unusual elements in the soup are a tiny spritz of vinegar and the use of shallot instead of garlic. The pesto is also good for dolloping on plain boiled potatoes or a simply cooked fish fillet or chicken breast, or on bruschetta, for serving as an appetizer.