Peel the herring from the bones and divide into pieces.
Remove the core from the apples and cut into thin slices.
Cut the cucumber into cubes or strips.
Cut the onion into half rings and soak for 20 minutes in vinegar solution (add 1/3 cup of vinegar to 1 cup of water).
Mix all the ingredients, season with pepper and mayonnaise.
If desired, you can add 2-3 boiled eggs or 2 boiled potatoes. Then your salad will be more satisfying.
