Preheat oven to 375°.
Sprinkle fish with salt and pepper. Arrange fish in a single layer in the center of a jelly-roll pan lightly coated with cooking spray. Combine tomatoes and remaining ingredients; toss gently. Arrange tomato mixture around fish on baking sheet.
Bake at 375° for 20 minutes or until fish flakes easily when tested with a fork or until desired degree of doneness. Place 1 fillet on each of 4 plates; top each serving with about 1/4 cup tomato mixture.