Clean fish and let soak in salt water for 10 minutes. Remove and pat dry. Place fish on ceramic platter. Mix remaining ingrediants and spread over fish, making sure you cover it completely. Ley set for a few minutes, then turn the fillet over so both sides of fish are well covered. Cover platter and place in fridge. Trun fish several times. Let soak for 8 hours. Serve on lettuce and eat with crackers.