I have a crock pot of Low Sodium Spaghetti Sauce going. My 57 year old husband has high blood pressure and he's overweight. Yes, I'm a fatty too! Ugh! My sauce is so American! Just two large cans of tomato paste and 4 cans of water. Whisk until smooth and add herbs and spices and ground beef. A simple recipe with no salt added other than what's in the tomato paste.
Why do I use tomato paste only for my sauce? Well if you read a can of plain tomato sauce it says "TOMATO PASTE, WATER" That's it! And it costs a lot more than a 8 ounce can of sauce like I used to use when I was a young wife married for the second time to a 27 year old man with high blood pressure, (Yes even at that age!).