Rinse vegetables

Dice onions

Dice tomatoes

Cut large shrimp into halves or thirds (however you prefer)

Soak shrimp in lime juice (fresh or bottled) for 30 minutes

Put tomatoes and onions into a tumbler or bowl for mixing, then add a dash of salt and cilantro

Pour lime soaked shrimp into mixture and mix or stir well

Chill dish for an hour then serve cold