Let the shrimp in the water just until they are cooked, 3 to 5 minutes. Remove the shrimp to a plastic container and refrigerate.
In a small bowl, combine onion, remaining lemon juice, ketchup, mayonnaise, pepper, hot sauce, and parsley.
Add the shrimp and serve in glass bowls over the lettuce. Serve with crackers and garnish with olive oil and parsley.
ADVERTISEMENT
