1 1/4 cups dried white beans (8 ounces), soaked overnight and drained
3 tablespoons extra-virgin olive oil
2 ounces pancetta, finely diced
2 medium shallots, minced
2 large celery ribs, finely diced
1 medium onion, finely diced
1 large carrot, finely diced
1/2 fennel bulb, cored and diced
4 garlic cloves, minced
1/2 teaspoon crushed red pepper
2 bay leaves
2 tablespoons tomato paste
One 14-ounce can plum tomatoes, chopped, juices reserved
1 quart low-sodium chicken broth
Salt and freshly ground pepper
1 cup baby arugula
1/2 cup flat-leaf parsley leaves
1 tablespoon fresh lemon juice