Provençal Fish Fillets

Thaw fish, if frozen. Rinse the fish; pat dry with paper towels. Set aside.

For sauce: heat oil in a small saucepan over medium heat. Add onion and garlic; cook for about 5 minutes or until tender, stirring occasionally. Add tomatoes, thyme, olives, and capers. Heat to boiling; reduce heat to medium. Simmer, uncovered, for about 10 minutes or until most of the liquid has evaporated.

Meanwhile, preheat broiler. Measure thickness of the fish. Place the fish on the greased unheated rack of a foil-lined broiler pan, tucking under any thin edges. Broil 3 to 4 inches from the heat for 4 to 6 minutes per 1/2-inch thickness of fish or until the fish flakes easily when tested with a fork, turning the fish once if the fillets are 1 inch thick. Serve with the sauce and if desired, garnish with fresh thyme sprigs.