In a pinch, you can also use fresh tomatoes, but be prepared to do some extra work, like blanching and peeling them - it's a bit of a tomato tango, if you will. Another option is to use tomato paste, which is like the concentrated superpower of the tomato world - just mix it with some water, and you're good to go. Keep in mind that using tomato paste will give your sauce a more intense flavor.
But wait, there's more! If you're feeling adventurous, you can try using other types of tomatoes, like cherry or grape tomatoes, which will add a burst of sweetness to your sauce - just be sure to chop them up into teeny-tiny pieces. And if you're a daredevil, you can even use canned tomatoes, which are like the trustworthy sidekicks of the tomato world - just be aware that they might contain added salt or sugar. The key is to experiment and find the combination that works best for you.