After hearing so much about this recipe and the "Essentials" cookbook I bought the book and made the Tomato Sauce with Onion and butter. It was delicious; however, the tomatoes I had on hand were really sour. I am looking forward to summer when I can use fresh tomatoes but until then I need to use canned products. I predict that I will make this dish often, so I'd like to have a better brand of canned tomatoes on hand. I have quite a few options for purchasing them. There a couple of stores in my area that specialize in Italian foods and we have a Whole Foods and Trader Joe's close too. Thanks in advance.