Peel all onions and cut into rings. Cut the cucumber into small pieces. Peel and core the apple and cut into small pieces.
Put the yoghurt in a bowl (I use homemade yoghurt) it is also good with at least 3.5% fat. Now fold the sliced onion, cucumber and apple into the yogurt.
Now chop the fresh chives on top and season with salt and pepper, add a little lemon juice and mix again. Now add the herring and cover with the yogurt. Now in the refrigerator and let it steep for at least 3 hours.
Taste again before consumption! We also eat jacket potatoes. Fried potatoes are also good (also very good).