If you prefer to use the lime juice "cooking" method with raw shrimp, simply skip the stove cooking part. Chop up the raw shrimp and add it to a bowl with the red onion, cucumber, and citrus juices. Cover and let it sit in the fridge for 2-3 hours until the shrimp is pink and no longer opaque. Toss with remaining ingredients and let it sit in the fridge for another 30 minutes or longer. Enjoy!