¾ cup plain Greek yogurt (nonfat works great)
¼ cup mayonnaise
1 tablespoon prepared horseradish
1 tablespoon lemon juice
2 teaspoons Worcestershire sauce
2 teaspoons Dijon mustard
1 teaspoon hot sauce, more or less to taste
1 teaspoon pickle juice (dill or sweet)
1½ teaspoons Cajun seasoning
Whisk all ingredients together; add additional hot sauce, lemon juice, etc. if desired. Best if chilled 30 minutes before serving.