Rinse the herrings one by one, drain them briefly and place them in a large bowl. Fill the bowl with cold water and place in the refrigerator or other cool place. Soak the herrings for 24 hours, changing the water 1 to 2 times.
Making the brew:
To do this, put the spices, salt, sugar and a few quartered onions in a saucepan with the liquid ingredients and bring to the boil. After 10 minutes turn off the stove and let the brew cool down.
Insert the pegs the next day:
To do this, cut the remaining onions into thin slices. Put the brew through a sieve in a saucepan. Spread the sieve lightly with a spoon. Remove the herring fillets from the water and rinse. Put onions and fillets in layers in a saucepan and pour the brewed liquid over them so that everything is covered. Cover the herrings and let them stand in the refrigerator for another 2 days.