Śledzie w Sosie Musztardowym (Herring in Mustard Sauce)

Śledzie w sosie musztardowym, a traditional Polish dish, showcases the unique combination of tangy mustard, tender herring, and a touch of sweetness. This dish is a favorite during festive seasons but is equally loved as a year-round appetizer or snack. Packed with flavor and simple to prepare, it’s a delightful way to explore Polish culinary traditions.

Ingredients
300 g (10.5 oz) pickled herring fillets (soaked in water or milk for 1-2 hours to reduce saltiness)
2 medium onions, finely sliced
3 tbsp Dijon mustard
2 tbsp whole-grain mustard
2 tbsp mayonnaise
2 tbsp sour cream
1 tbsp honey (optional, for a subtle sweetness)
2 tbsp white wine vinegar
1 tbsp olive oil
Freshly ground black pepper, to taste
Fresh dill, chopped, for garnish
Directions
Prepare the Herring

Rinse the soaked herring fillets and pat them dry. Cut into bite-sized pieces and set aside.
Make the Mustard Sauce

In a mixing bowl, combine Dijon mustard, whole-grain mustard, mayonnaise, sour cream, honey (if using), and white wine vinegar. Whisk until smooth and creamy.
Add Onions and Herring

Toss the sliced onions into the mustard sauce and mix well. Gently fold in the herring pieces, ensuring they are evenly coated.
Rest and Chill

Transfer the mixture to an airtight container. Let it marinate in the refrigerator for at least 4 hours, preferably overnight, to allow the flavors to meld.
Serve

Arrange the herring and sauce on a serving platter. Garnish with freshly chopped dill and a drizzle of olive oil. Serve chilled with crusty bread or boiled potatoes.
Serving and Storage Tips
Serving: Śledzie w sosie musztardowym is best served as an appetizer or side dish. Pair it with rye bread or a shot of chilled vodka for a traditional Polish experience.
Storage: Store in an airtight container in the refrigerator for up to 5 days. The flavors intensify with time, making it even tastier on subsequent days.
Variations
Apple Addition: Add finely diced tart apples for a touch of freshness and sweetness.
Spicy Twist: Incorporate a dash of horseradish or cayenne pepper for a spicier flavor profile.
Herbal Note: Replace dill with parsley or chives for a different herbal touch.