Cut fish into slices and season with salt, pepper, paprika, and garlic salt. Set aside.
Cut 2 or 3 large onions into slices and carmelize in a pan with 1 cup sugar until golden brown. Remove pan from fire and add 1/4 cup wine vinegar. Place fish pieces on top of onions an add enough HOT water to cover the fish. Sprinkle raisins, and cook over medium heat 1/2-3/4 hours.