I haven’t used store-bought marinara sauce for several years, and if you’ve never made your own, I highly recommend you do. I like that you know exactly what’s in it, can control the amount of sugar and sodium, and tailor it to your taste. It’s best when tomatoes are in season and you can cook down fresh ones, but in the winter, I use canned San Marzano tomatoes. They’re sweet, not overly acidic, and have less seeds than other varieties, making them ideal for sauce. Make a large batch, let it cool, and freeze it plastic containers for future use.