Wash six Roma tomatoes thoroughly, dice them into small pieces, and place them in a medium mixing bowl.

Finely chop half a white onion and mince one jalapeno, removing seeds if desired.

Rinse and chop a handful of fresh cilantro, and add all the ingredients to the mixing bowl.

Squeeze the juice of one lime over the mixture, add salt and black pepper to taste, and gently mix.

Cover the bowl and let it chill in the refrigerator for at least 30 minutes.

Serve with tortilla chips or as a topping for tacos and grilled meats.