Finely dice all ingredients, add the liquid, season with salt & pepper. Mix thoroughly.
There are many ways to use the final summer harvest and one of the ways I enjoy most is salsa. Those late harvest tomatoes, with onions, peppers, a few select herbs and an acidic liquid of choice: vinegar, lemon juice, lime juice, etc. Yum. Fruit salsas are delightful, too. They usually don't last as long, though. A hearty salsa kept cold will last for weeks. Hint: the more acidity, the longer it will last.