Place all the ingredients in a blender. Mix until combined on medium speed until smooth and there are no large chunks.
Store in the refrigerator until ready to serve.
Notes
Katie's Tips:*I use San Marzano tomatoes because they are sweet and only slightly acidic. I always keep a few jars of them in my pantry because I use them for red pasta sauces. You can find San Marzano tomatoes in the Italian section of your grocery store.*If you like more heat, leave the seeds and the white inside membrane of the jalapeño. If you like a lot of heat, add hotter peppers like serrano. *The salsa will keep for a week in the fridge in an airtight container such as a mason jar.*This salsa recipe originated from Iowa Girl Eats.