Cut the onion, put it in an oval bowl, sprinkle salt over it and leave it for about 10 minutes so that the onions can become soft. Put the canned fish on the top, crumbled with a fork. The pickled cucumber is cut it into pieces, in small squares , also the red pepper and they are mixed with the onion. From a raw yolk and mustard you make a mayonnaise. Then mix with mayonnaise with the composition from the bowl. Garnish with olives and lemon slices.