Welcome to the group Tracker!!!!
Like most Italian recipes - the "authentic" one depends on which "authentic" Italian grandma you get it from.
You might want to check variations that are not from Lidia .... at http://www.google.com/search?hl=en&l...asta+e+fagioli
Italian recipes can be hard to find sometimes because they are not exactly when you experienced ... part of the beauty of Italian cuisine and what can drive you crazy trying to find a recipe ...