01 - In a large bowl, combine the matjes herring, diced apples, chopped onion, and diced cucumber.
02 - In a separate bowl, whisk together the sour cream, mayonnaise, lemon juice, salt, and pepper until smooth.
03 - Pour the dressing over the herring mixture and gently toss to coat.
04 - Add the fresh dill and mix carefully to combine.
05 - Refrigerate for at least 30 minutes before serving to allow the flavors to meld.