I have not yet tried this, but it is from an overdue library book (From Our Mothers' Kitchens) and I want to return the book tomorrow, so need to get the recipes I want to try copied down, pronto. The author of the book, Anita Stewart, says this recipe has been perfected over the years by herself and her mother. She says this is "the ultimate recipe" for chili sauce. When late summer rolls around this year, I'll definitely be trying this one! The prep time includes the time needed to let the tomato and onion mixture stand.