Combine all the ingredients for the 'cooking stock' in a saucepan and bring to the boil. Add the peeled shrimp and cook for 8 - 10 minutes until that have change to a nice 'healthy colour' then drop into ice water to stop cooking further.

In a large bowl combine prawns, cucumber, tomato, spring onion, coriander and Chile. Stir in the Passata and vinegar, squeeze lime juice over the mixture.

Serve in glasses with shredded lettuce or slices of celery.