Preparation:

combine onion, jalapenos, garlic, lime and salt in a serving bowl
set aside and let marinate while you chop the tomatoes, bell pepper and cilantro

add tomatoes, bell pepper and cilantro to bowl and stir to combine ingredient
taste and add more salt if necessary

let it marinate in the fridge for at least 15 minutes before serving

serve with a slotted spoon or corn chips on the side