1 large onion, sliced
2 cloves garlic, chopped
2 jalapeño chilis, seeded and chopped
1 (16 ounce) can whole tomatoes, drained and chopped
2 tablespoons white vinegar
1 1/4 teaspoons ground cumin
3/4 teaspoon ground coriander
4 halibut or other lean fish steaks, about 1 inch thick (about 2 pounds)
Chopped fresh cilantro, if desired
Preheat oven to 350*F. Spray 10-inch nonstick skillet with nonstick cooking spray. Cook onion, garlic and chilis in skillet over medium heat, stirring frequently, until onion is tender; reduce heat. Stir in remaining ingredients except fish steaks. Simmer uncovered over low heat 5 minutes, stirring occasionally.
Arrange fish in ungreased rectangular baking dish, 11 × 7 × 1 1/2 inches. Spoon tomato mixture over fish. Bake uncovered 25 to 30 minutes or until fish flakes easily with fork. Sprinkle with cilantro.