In a food processor, add capers, pickles, onion, garlic and dill. Process until finely chopped, pausing and scraping the walls once.
Transfer to a medium bowl along with Greek yogurt, mayo, sugar, lemon juice, pepper and stir. Alternatively you can finely chop all ingredients and mix by hand.
Enjoy right away with seafood and vegetable dishes of choice or refrigerate for later.
Notes
Store: Refrigerate in an airtight container for up to 5 days.