1/4 cup Parmesan cheese 2 tablespoons butter, softened 1 tablespoon and 1-1/2 teaspoons mayonnaise 1 tablespoon fresh lemon juice 1/8 teaspoon dried basil | 1/8 teaspoon ground black pepper 1/8 teaspoon onion powder 1/8 teaspoon celery salt 1 pound tilapia fillets |