Wash the tomatoes thoroughly, then dice them into small pieces.
Peel and finely chop the onion.
Remove seeds from the jalapeño and mince it finely.
Chop the fresh cilantro, ensuring no large stems remain.
In a mixing bowl, combine diced tomatoes, onion, jalapeño, and cilantro.
Squeeze the lime juice over the mixture.
Season with salt and black pepper to taste.
Gently stir the mixture to combine all ingredients.
Allow the salsa to sit for about 10 minutes to let the flavors meld.