This is how my mother makes her herrings. There are many ways to marinate and serve herrings and these are my favourite, marinated in vinegar, some sugar, carrots, onions, dill and allspice. I also like them done with tomato and onion. They need to stay in their marinade for about three days before you eat them. Keep the jar in the fridge and make sure that the herrings are immersed in the liquid. They will keep for about a week in the fridge and the flavour will get stronger. I use lightly