DO-AHEAD TIP: Marinate fish for 15 minutes (see recipe).
In medium bowl, combine 1/4 cup of Parmesan with next 7 ingredients (mayo through onion powder); blend well. Coat fillets with mayo mixture then place them in a shallow bowl or pan; cover and refrigerate for 15 minutes.
At time of cooking, place oven rack in middle position and preheat broiler. Remove fish from marinade and place on a foil-lined sheet pan or broiler pan. Coat fillets with the marinade and top with the remaining grated Parmesan. Broil fillets for 5 to 8 minutes or until golden on top and insides flake easily when tested with a fork.
Notes
SERVING SUGGESTION: Add steamed baby red potatoes.GLUTEN FREE: Make sure mayonnaise is gluten free.VEGETARIAN: Use tofu instead of fish.NUTRITION: Per Serving: 353 Calories; 17g Fat; 46g Protein; 3g Carbohydrate; trace Dietary Fiber; 111mg Cholesterol; 399mg Sodium. Exchanges: 0 Grain(Starch); 6 Lean Meat; 0 Fruit; 0 Non-Fat Milk; 2 Fat; 0 Other Carbohydrates.