Dice all vegetables into small, bite-sized pieces, including celery, bell pepper, sweet gherkins, and pickled peppers.
Shred the carrot, chop the green onions and cilantro, and dice the hard-boiled eggs.
In a large bowl, combine all vegetables, eggs, tuna, and slivered almonds.
Add 1-2 teaspoons of mustard and 1 tablespoon mayonnaise (optional) and mix well.
Pour in plain yogurt and a splash of pickle juice until desired creaminess is reached.
Season with salt and pepper to taste and mix thoroughly.
Refrigerate until cold and serve as desired—on bread, in a pita, wrapped in lettuce, or straight from the bowl.