Sledz w Oleju (Polish Herrings)

Name: Sledz w Oleju (Polish Herrings)
Prep time: 8 min
Cook time: 16 min
Total time: 24 min
Yield: 4 servings
Cuisine: Polish
Ingredients: 8 Herring; 1 sliced Onion; 1/2 cup Olive Oil; 1 tsp Allspice; 1 tsp Pepper; 1 Bay Leaf

By The Spice & Simmer Kitchen · Published May 3, 2026

A one-pot Seafood recipe with Polish flavors, built for busy weeknights when you want real food without a sink full of dishes. Comes together in roughly 42 minutes, serves about 4, and uses ingredients you can find at any normal grocery store. The technique is simple: build a base in your pot, layer in the main ingredients, simmer until everything has had time to talk to each other, and serve straight from the pan. If you're cooking for picky eaters, this one tends to land — the flavors are recognizable, the texture is comforting, and there's nothing weird hiding in the ingredient list. Perfect for the kind of evening where you want dinner on the table by 7pm and the kitchen empty by 7:30.

Step-by-step instructions

Soak herring in cold water for at least 1 hour. If very salty, repeat, changing the water each time.
Drain thoroughly and slice herring into bite-size pieces.
Place in a jar large enough to accommodate the pieces and cover with oil, allspice, peppercorns, and bay leaf. Close the jar.
Refrigerate for 2 to 3 days before eating. This will keep refrigerated up to 2 weeks.
Serve with finely chopped onion or onion slices, lemon, and parsley or dill.

Why this works on a weeknight

Sledz w Oleju (Polish Herrings) genuinely fits a 30-minute weeknight window, which is why it earned a spot in our Skillet & One-Pan collection. The technique is forgiving, the ingredient list is grocery-store standard, and the active cooking time is short enough that you can answer a text message in the middle without ruining dinner.

Cleanup notes

This is a single-pan recipe, so the cleanup is exactly one pan, one cutting board, and one knife. While the dish rests, fill the pan with hot soapy water — by the time you are done eating, the residue lifts off with a single pass of a sponge. Skip the steel wool on cast iron; a stiff brush and warm water are all you need to keep the seasoning intact.

Make-ahead and leftovers

Leftovers keep covered in the fridge for up to three days. Reheat in a dry pan over medium-low with a splash of water or stock to loosen the sauce. Sledz w Oleju (Polish Herrings) actually improves overnight as the flavors keep talking to each other, so doubling the recipe and packing tomorrow's lunch is a high-leverage weeknight move.

Filed under 🥘 Skillet & One-Pan Seafood Polish ⚡ 30-Min Dinner