Rinse the herring fillets under cold water and pat them dry with paper towels.
Thinly slice the onion into rings and set aside.
In a saucepan, combine the vinegar, water, salt, and sugar. Bring to a gentle simmer over medium heat, stirring until the sugar and salt have completely dissolved.
Place the herring fillets in a clean glass jar. Layer them with the sliced onion rings, black peppercorns, bay leaves, mustard seeds, and dill.
Carefully pour the hot brine over the herring fillets, ensuring they are fully submerged. If necessary, use a clean utensil to gently press down on the fish.
Allow the mixture to cool to room temperature. Seal the jar tightly and refrigerate for at least 24 hours before serving. This allows the flavors to meld.
The pickled herring will develop an even richer and more complex flavor over time. It can be stored in the refrigerator for up to two weeks.
To provide the best experiences, we and our partners use technologies like cookies to store and/or access device information. Consenting to these technologies will allow us and our partners to process personal data such as browsing behavior or unique IDs on this site and show (non-) personalized ads. Not consenting or withdrawing consent, may adversely affect certain features and functions.
Click below to consent to the above or make granular choices. Your choices will be applied to this site only. You can change your settings at any time, including withdrawing your consent, by using the toggles on the Cookie Policy, or by clicking on the manage consent button at the bottom of the screen.