Not totally because there's sugar in tomatoes on the vine. But you can make no-sugar-added tomato sauce; Hunts and Walmart brands are this way.
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To cook your fresh tomatoes into a sauce or a paste, chop and blend them. Cook in a wide pan on medium low until the tomatoes have reduced to a sauce or paste according to your liking stirring constantly Season with salt and a bit of sugar if necessary. Careful to not burn.
Tomato sauce
The difference between ketchup and tomato sauce is that tomato sauce is only one ingredient in ketchup. Ketchup also has sugar, vinegar, and spices. That is the difference bye
Add 1 teaspoon of white sugar for each cup of fresh tomato sauce. Not only does this sweeten the sauce quite nicely, it also reduces the chance of heartburn or acid reflux often caused by tomato based sauces.
Tomato sauce
Add more sugar, salt and tomato sauce.
The amount of sugar in tomato sauce can vary depending on the brand and recipe. On average, there is about 1-2 teaspoons of sugar per serving (1/2 cup) of tomato sauce. It is always a good idea to check the nutrition label for the specific amount in the brand you are using.
Tomato sauce is cooked to allow the liquid in the tomatoes to reduce which creates the sauce or paste. Tomato ketchup is cooked tomatoes with added ingredients such as vinegar, sugar, salt, and other spices.
you have to add vinegar to the tomato paste in a 4 (oz of tomato) : to 1(oz of vinegar) ive done it for years hope it helps hun!!
try adding sugar..
The primary ingredient in spaghetti sauce is tomatoes. Tomato puree is just processed tomatoes with the skins and seeds removed. Tomato sauce is that plus sugar and spices. When it comes to pasta sauce, there are as many recipes as cooks, and they all use this basic ingredient. Certainly there are those brave souls who actually start with the fresh tomatoes. Lord have mercy! Bon appétit.