Sałatka Śledziowa z Burakiem i Groszkiem: A Delightful Polish Salad Recipe

300g pickled herring fillets (soaked in water if too salty)
2 medium-sized beets, boiled and peeled
1 cup green peas, cooked or canned (drained)
3 medium potatoes, boiled and peeled
1 small red onion, finely chopped
3 hard-boiled eggs, chopped
3 tablespoons mayonnaise
1 tablespoon sour cream
1 teaspoon mustard
Salt and black pepper, to taste
Fresh dill, for garnish

Directions: