Wash and dice the tomatoes, red onion, and jalapeno into uniform pieces.

Roughly chop the fresh cilantro leaves.

Transfer the tomatoes, red onion, jalapeno, and cilantro to a medium glass or ceramic mixing bowl.

Pour the fresh lime juice over the mixture and sprinkle with kosher salt.

Stir everything gently until well combined, then serve immediately with tortilla chips or cover and refrigerate to let flavors meld.