Paste: Is concentrated tomato pulp with the skin, stems and seeds removed. It is a very versatile product that can be used in sauces, gravies, ...
One recommendation in the article is "3. Use a tomato passata to make tomato-based sauces."
So now that I know what passata is -- thank you for that -- I will be on the hunt for it for the sake of my beleaguered GI system.