Place cod in a baking dish (preferably thawed). Sprinkle seasoned salt lightly over fish. Take the juice of the lemon and sprinkle over fish. Take the butter and slice it over the fish so that each piece of fish has 2 or 3 pieces of butter on it. Bake in a 350 degrees oven with foil over dish for 30 minutes. Remove and sprinkle parsley over fish and serve.