Cut the onion into small cubes. Pour into a bowl, sprinkle with lemon juice and pour boiling water. A slice of lemon is also sent to a bowl. Leave for 10 minutes.
Cut the potatoes into cubes. Pour into a deep bowl.
Peel the Apple, remove the core and cut into small cubes. Send in a bowl with potatoes.
Cut the herring fillet into small cubes. Pour into a bowl with the rest of the ingredients.
Drain the water, remove the lemon slice and send the onion to the bowl. Cut the eggs into halves and carefully remove the yolk. Cut the yolk into cubes and also send it to the bowl. Pepper and salt to taste.
Last of all, add finely chopped dill and sour cream.