How to Make It
Bring a large saucepan of salted water to a boil. Stir in the shrimp and cook until white throughout and curled, about 1 minute. Drain the shrimp and rinse under cold water. Pat dry and spread on a platter to cool.
In a large bowl, combine the lime juice with the garlic. Whisk in the olive oil. Add the shrimp, cucumbers, tomatoes and parsley, season with salt and pepper and toss to coat. Line a platter with lettuce leaves, mound the shrimp salad on top and serve.