a pinch of sea salt and 1/2 teaspoon freshly ground black pepper
Preparation
Place dill pickles cut into several pieces into a food processor, add drained mushrooms, peeled onion, parsley leaves, and chop everything. If you don't have a food processor, chop ingredients on a cutting board.
Add chopped chives, sour cream, mayonnaise, mustard, honey, lemon juice, salt, and pepper. Mix and transfer to a small bowl.
Arrange herring fillets on a plate and pour sauce over them, garnish with lemon wedges and parsley.