15 Secret Ingredients Your Store-Bought Tomato Sauce Needs - Chowhound

Onions, much like garlic, are a counterintuitive ingredient, and therefore a well-kept secret. Almost every pasta sauce you buy will already have onions in it, but many brands cook them to death during the heat-intensive canning process. While we're all for killing bacteria, it's nice to be able to taste your alliums, right? Advertisement As such, your sauce will benefit from slowly sweating or caramelizing…