Combine The Base Ingredients: In a medium mixing bowl, blend the mayonnaise, dill pickle relish, and finely chopped onion until well combined.

Add Flavor And Texture: Stir in the chopped capers, lemon juice, black pepper, and dried parsley. These ingredients add layers of flavor and a slight crunch to your sauce.

Season: Taste your mixture and add a pinch of salt if needed. Remember, the capers and pickle relish already add a salty tang, so adjust accordingly.

Chill And Serve: Cover the bowl with plastic wrap and refrigerate for at least an hour. This step is crucial as it allows the flavors to meld together, creating a more cohesive taste profile.