1. Preheat oven to 400°.
2. Line a large baking sheet with foil; coat foil with cooking spray.
3. Brush 1 1/2 tablespoons hot sauce evenly on both sides of fillets; sprinkle with Cajun seasoning, and dredge in cornmeal, pressing gently. Place fillets on prepared pan. Coat fillets with cooking spray. Bake at 400° for 14 minutes or until fillets flake easily when tested with a fork.
4. While fillets bake, combine remaining 1 tablespoon hot sauce, sour cream, and salt in a small bowl, stirring with a whisk. Serve fillets with sauce and lemon wedges, if desired. Sprinkle with parsley, if desired.
Serve with: Sweet-and-Sour Broccoli Slaw