Clemenza was trying to teach it to Michael Corleone while the latter was getting embarassed on the phone by Kay. Funny but Clemenza's recipe didn't sound like it would make very good spaghetti sauce... then again, I see Mario Batali on TV doing close to the same thing.
the sopranos cookbook is a pretty good mafia one. however, if anyone makes any recipes from it, reduce the cooking times on just about everything. i followed a few recipes to a "t", and found everything was overdone.
btw, i love the spelling of their pizza recipe, it says "ah beetz". if you say it with an italian flair it sounds just right.