- Rinse and strain shrimp then add to a shallow bowl. Pour ½ cup of lime juice over shrimp and stir well. Cover and refrigerate until shrimp turns pink, about 1 hour.
- Drain and discard lime juice. In a medium mixing bowl, combine shrimp, tomato, onion, cilantro, jalapeño, soy sauce, and remaining ¼ cup of lime juice. Stir well, then cover and refrigerate 30 minutes longer.
- Add avocado and cucumber to ceviche and stir gently. Serve with plantain chips for dipping.