Jarred spaghetti sauce is one of my least favorite inventions of the century. I get that it’s quick and sometimes necessary, but if you stick a jarred pasta sauce next to a homemade version (even a quick homemade version), it’s not even close. The homemade version is substantially better.
Most of the flavor from jarred sauces, regardless of what they say on the labels, comes from salt. Just lots and lots of salt. But when you make sauce yourself, you’ll find that the taste is a lot more complex. It’ll have a fresh tomato flavor, and whatever herbs you choose to put in it will really pop.