Preheat your oven's broiler. Spray a broiling pan or aluminum foil with non stick cooking spray.
In a small bowl, mix together the Parmesan cheese, butter, mayonnaise and lemon juice. Season with dried basil, pepper, onion powder and celery salt. Mix well and set aside.
Arrange fillets in a single layer on the prepared pan. Broil a few inches from the heat for 2 to 3 minutes. Flip the fillets over, and broil for a couple more minutes. Remove the fillets from the oven and cover them with the Parmesan cheese mixture on the top side, then Sprinkle with Old Bay Broil for 2 more minutes or until the topping is browned and fish flakes easily with a fork. Be careful not to over cook the fish.