Preheat oven to 400 degrees F.
In a large skillet, saute zucchini and tomatoes in olive oil over medium heat for 5 minutes. Remove skillet from heat and stir in vinegar and scallions. Sprinkle with pepper.
Arrange fish steaks in one layer in a medium oiled baking dish. Pour tomato and zucchini mixture over fish. Bake for 15 minutes or until fish is done.
Recipe provided by Low Cholesterol Olive Oil Cookbook
Courtesy of Filippo Berio Olive Oil