Arrange Fish Fillets In A 13-In. X 9-In. X 2-In. Baking Dish Coated With Nonstick Cooking Spray. Brush The Top Of Each Fillet With Mayonnaise. Sprinkle With Peanuts And Pepper. Bake, Uncovered, At 450 Degrees F For 10-15 Minutes Or Until Fish Flakes Easily With A Fork. Meanwhile, Combine The Salsa Ingredients In A Bowl. Serve With The Fish.