
Rinse shrimp and pat dry. Soak shrimp in juice from 2 lemons for at least 4 hours or until pink. Discard juice.
Optional step: Boil a pot of water and blanche the marinated shrimp for 1 minutes. Place directly into an ice bath to chill the shrimp and stop the cooking process.
Combine with remaining ingredients. Taste and adjust salt as desired.
Serve on tostada shells or with tortilla chips. Garnish with lime wedges and squeeze juice over the top.