1. Preheat oven to 350°.
2. Sprinkle fillets with oregano and cracked pepper. Place fillets and tomato in a 13 x 9-inch baking dish coated with cooking spray. Add wine. Bake, uncovered, at 350° for 15 minutes or until fish flakes easily when tested with a fork.
3. To serve, place tomato slices evenly on individual serving plates, using a slotted spoon. Top each serving with a fillet and 1 teaspoon olives. If desired, garnish each serving with a fresh oregano sprig and whole peppercorns.
Note: Fish is a vitamin-rich source of low-fat protein, making it a perfect choice for heart-healthy eating. When you buy fish, choose what's freshest and cook it that day or the next. The fish's flesh should appear firm and unblemished. And it should not have a "fishy" smell.