Winter Minestrone

Name: Winter Minestrone
Ingredients: 1/3 pound sliced pancetta, chopped; 3 medium red onions, chopped; 4 celery ribs, chopped; 2 medium carrots, chopped; 1/3 cup extra-virgin olive oil; 1 bunch Swiss chard; 6 garlic cloves, finely chopped; 2 tablespoons tomato paste; 1 (28-ounce) can whole tomatoes in juice; 3 quart hot water; 5 cups coarsely chopped cored Savoy cabbage (6 ounces); 5 cups coarsely chopped escarole (1/2 pound); 1 piece Parmigiano-Reggiano rind (about 3 by 1 1/2 inches); 1 (19-ounce) can cannellini beans, rinsed and drained; Accompaniments: extra-virgin olive oil for drizzling; cooked ditalini pasta tossed with oil (optional); grated Parmigiano-Reggiano