Hedy, I usually add leftover sauce I've frozen to the new batch and it works out just as well. I suppose you're looking for the flavor of sauce that has had time to cure or develop but ready to eat out of the pot. Works like a charm. Great recipe BTW! Thanks and PIONEER WOMAN: on a side note, just so you know I ate the Penne a la Betsy today for lunch with fresh homemade Linguine and it was a huge hit! Here in Malaga, Spain, we get AMAZING sea food from our municipal market and it was DIVINE.