Remove and discard stems from kale. Coarsely chop leaves to equal 6 cups, reserving any remaining kale for another use. Wash chopped kale thoroughly in cold water. Drain well, and set aside.
. Heat olive oil in a large Dutch oven over medium-high heat. Add onion, celery, and garlic; sauté 5 minutes or until vegetables begin to soften. Add chopped kale, broth, and next 7 ingredients. Bring to a boil. Cover, reduce heat, and simmer 25 minutes or until vegetables are tender. Stir in pepper.