Salt isn't that bad for you, provided you're using unrefined sea salt and aren't eating pre-packaged foods that come loaded with sodium.
If you happen to live near a Whole Foods, stock up on their colorful, glittery unrefined salt. And when preparing sauce, make it from scratch using crushed tomatoes (or fresh, if you're a masochist), that way you can control everything that goes into it.
“The whole concept of a macronutrient, like that of a calorie, is determining our language game in such a way that the conversation is not making sense." - Dr. Kurt Harris