Śledź w Śmietanie (Herring in Sour Cream)

1. If you're using brined herring fillets, you have to soak the fish to remove the excess salt. To do that, place the herring in a bowl and cover with water and leave aside for 1 hour, at least. If you have oil fillets, just dry them thoroughly with a paper towel and cut them into strips. Such herring fillets do not need to be soaked in water. 
2. Peel two small or one larger onion and chop finely.
3. To soften the onions and remove some of the peppery taste, place them in a strainer and pour freshly boiled water on top to blanche.
4. Once the fish has soaked sufficiently, strain away the water and dry using some kitchen towels. Cut the herring up in bite-sized pieces and throw them in a bowl.
5. Peel and grate the apple and toss it into the bowl together with the onion.
6. Add 1.5 cup of sour cream (or more) and the chopped dill and stir everything thoroughly (it will keep the apple from browning as well as give a creamy flavor to the fish).
7. Season to taste with pepper and place in the fridge for the flavors to meld 1 hour (or more, until it's time to serve).

Enjoy!