For the marinade, mix all the ingredients with 1 liter of drinking water. Bring to a boil and immediately remove from heat. Cool completely. Pour the gutted herring and leave for 48 hours.
For dill oil in a blender, grind sunflower oil and dill together. Leave until use.
Arrange marinated herring, cottage cheese and thinly sliced cucumbers on plates. If desired, you can cut small balls out of them with a carving knife. Strain the oil and decorate the dish. Serve.