Cut the hydrated cod into 2-inch by 2-inch pieces. In a large pot of cold water, add the carrot
, celery, and onion. When the water begins to simmer
, add the cod pieces and cook for about 5 minutes, or until the cod begins to flake. Once cooked, remove the skin and any odd bone you may find. Break up the cod and place in a salad bowl with the olives, parsley, olive oil, and salt, to taste. Mix well. Let the salad rest in the refrigerator or serve immediately.