Mix 1/4 cup of vinegar and 3 3/4 cups of ice coldwater
Cut off head, tail and the dorsal and pectoral fin
Slice along the stomach and remove the intestines
Butterfly the fish or slice two filets
store the cleaned fish in the cold dilute vinegary solution (above), preferably not longer than an hour
freezing
Drain the fish and place them in a vacuum sealed bag or zip lock bag and freeze them for at least 48 h at -20 C
brining
Make a solution of 1/2 cup salt (iodine free), 1/2 cup sugar in around 3 cups of water
Place the frozen fish in the brine solution for 12 hours. The salt and sugar will extract water from the fish, which helps preservation and imparts taste
pickling
Mix all the pickling ingredients (except for the onion and lemon) together and bring to a boil. Simmer for 10 minutes. Then let it cool
Slice the onion and lemon in thin rings
Sterilize the jars by filling them with boiling water and lettting them stand for 10 min, do not forget the lids
After the jars are sterilized, empty them carefully and place a layer of onion rings and some lemon on the bottom. Add fish fillets to a third, then add the pickling liquid with herbs, add more onion, lemon, fish and pickling liquid, until the jar is full.
Cap the jar with the steralized lid and refrigerate
making the curry salad
Cut the dill pickles and cooked macroni (if using) in very small slices
Mix all the other ingredients and let it stand in the fridge preferably for a day, so the flavors blend
serving
Drain some fillets and serve them on dark rye bread, covered with a thin spread of sour cream and then top the fish with curry salad. If you can get your hands on it, serve a glass of aquavit with it.