Dissolve the Gelatin: In a small bowl, sprinkle gelatin over cold water and let sit for 5 minutes.
Heat the Soup: In a saucepan, warm the tomato soup over low heat. Once hot, stir in the gelatin until fully dissolved. Remove from heat.
Mix Creamy Base: In a large bowl, beat the cream cheese until smooth. Gradually add the mayonnaise, lemon juice, and Worcestershire sauce.
Combine Everything: Stir in the tomato soup mixture, shrimp, celery, green onions, salt, and pepper. Mix until well combined.
Mold and Chill: Pour the mixture into a lightly greased mold. Cover and refrigerate for at least 4 hours or until firm.
Serve: Unmold onto a platter and garnish with fresh parsley, shrimp, and lemon slices. Serve with crackers or veggies.