I received this book 12 years ago so I've had some time to experiment with it. It's even followed me across the pond to my home in Bologna where I continue using it.
For me the best recipe in the book is the BASIL AND ONION MASHED POTATOES (p 345).
To die for.
I've made this for crowds of Italians and they beg for more. Granted, nobody has ever actually heard of this recipe but judging by the ingredients, it sounds very much like something that you would find on the emilia-liguria border. Mmmmm... My hint, make lots of it, HEAPS of it and freeze some directly in the pans so you can pull it out for a last minute dinner party because it is a) time consuming b) a show stopping side dish and c) freezes well.
Oven Roasted Potatoes Recipe
While I'm on pg 345, this recipe is also good. Gives great results and is how the best oven roasted potatoes are made in italy.