Preheat oven to 375°F. Coat baking dish with no stick cooking spray. Place fish in single layer in baking dish. Lightly salt and pepper the fish. Bake 12 minutes. If fish is over 1-inch thick, increase cooking time to 15 minutes.
Meanwhile, heat oil in medium saucepan on medium heat. Add onion; cook and stir 5 minutes or until softened. Add tomatoes, olives, wine, basil, garlic and thyme. Simmer, uncovered, 3 minutes.
Remove fish from oven. Spoon sauce over fish. Return to oven; bake 5 minutes longer or until fish flakes easily with a fork. Serve immediately.