HERRING IN OIL (sledzie w oleju) –
Into a jar or glass bowl pour a little salad oil, add a layer or herring (soaked), then a thin layer of chopped onion, and keep layering until ingredients are used up. Top layer should be chopped onion. Top up with oil, seal and refrigerate. Let stand in fringe at least 24 hrs before serving. They will keep in the fringe a week or longer