1. Saute onion and garlic in hot oil in a nonstick skillet over medium-high heat 2 minutes. Stir in tomatoes, broth, olives and oregano; simmer 5 minute.
2. Place fillets in a lightly greased baking dish. Spoon tomato mixture over fillets. Bake at 425F for 10-15 min or until fish flakes with a fork. Sprinkle with feta cheese and parsley. Garnish with additional sliced black olives, if you like.