Wash and dice the tomatoes into small pieces.
Finely chop the red onion and add to the bowl.
Chop the fresh cilantro and add it to the mix.
Seed and mince the jalapeño, adjusting the amount for desired heat.
In a large bowl, combine all the chopped ingredients.
Add lime juice and season with salt to taste.
Mix everything well until combined.
Taste and adjust seasoning if necessary.
Let the salsa sit for 10 minutes before serving.
Serve with tortilla chips or as a topping on your favorite dishes.