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I'll give you two recipes.First is from the ice-fishing annual from In-Fisherman, it calls for pike.I made a big batch with whitefish. I find this first recipe a bit sweet but it tastes nice.Ingredients:4lbs. fish fillets, 1 cup white sugar, 1 cup salt , 1/2 cup brown sugar, 4 cups water, 5 tbsp. pickling spice, 4 cups white vinegar, 1 medium onion - sliced.Directions:Freeze fish for 3 days (to kill anything unwanted)Thaw and cut fillets into 1/2" stripsIn a large steel pot, crock or plastic container mix salt and water and add fish.Store in the fridge for at least 2 days, longer won't hurt. (this is according to the magazine, I'd go 2 days MAX).Drain then cover with 2 cups of vinegar for another day.For the brine - in saucepan combine 2 cups white vinegar, the sugar and pickling spice and heat to a boil. As soon as it boils remove from heat and allow mixture to cool.Alternate layers of fish and onion slices in a crockery pot, or wide-mouthed gallon jar, or smaller jars. Pour brine over the fish and refridgerate for 2 weeks.Recipe #2This one resembles the type of pickled fish you'd buy in the store (herring/rollmop)Cut fillets into desired sizes of strips.Place in a salt brine, 1 cup of water to 4 cups water and leave in fridge overnight.Drain and rinse well.In a saucepan add 3 cups pickling vinegar, 1 cup water, 1 tsp. white sugar, 1 tsp. salt,2 tbsp pickling spice ( I like to add a spoonful of peppercorns ). Bring to a boil.As soon as it boils remove from heat and cool it down. Slice one medium onion. Add cool mixture to your fish in the jars, alternating layers of fish with onion slices. Refridgerate for at least 2 weeks.I made 2 batches of this type last month, 1 with pike and 1 with whitefish. Both were excellent but the pike seemed firmer. Also, I'd recommend skinning the fish and using boneless fish. Even though the pickling process softens any bones and makes the skins edible people seem to prefer it without either. I do my pike up the 5 fillet method and skin the fillets anyway so this wasn't a problem. For the whitefish I filleted it and skinned it but left a few of the Y bones in it. You could steak a whitefish and cut around the bones if you prefer. I did this for the canning.The original recipe called for two days in the salt brine but I served this up last month at a "Big Buck Night" and some people mentioned that the fish tasted a bit salty. They did say the pickled fish was very good though. You may want to shorten the salt brining process to only one day, or as a friend of mine does a few hours.Hope you find this helpful.Regards,Glen