From one of the great Joyce Goldstein's cookbooks (maybe Back to Square One, maybe Kitchen Conversations). I've made this dozens of times, including as a meatless Thanksgiving alternative. It's reliable and good. It's easy to prepare the dough in advance, then just cook when ready to serve. Be sure to drain and warm the puree to dry it out or it will require up to 2 more cups of flour to reach the right consistency. Trust me on this.