Tuscan Beans with Pancetta & Cavolo Nero

I found this recipe last year and I made it twice in one week after I first tried it. Stick to the ingredients as they are listed, it's a magical combo. You can swap two cans of cooked white beans for dried if you don't have time. But the dried beans are the best.
Oh and if you have leftover celery, just chop it and freeze it so that you have some on hand when you make this recipe again. You WILL make it again.