Place fillets in a 13- x 9- x 2- inch baking dish; sprinkle with 1/2 teaspoon salt and 1/8 teaspoon pepper. Arrange tomato and onion slices over fish; sprinkle with remaining salt and pepper. Drizzle oil over vegetables.
Bake, uncovered, at 350° for 20 minutes or until fish flakes easily when tested with a fork. Sprinkle with parsley, and serve immediately.
Oxmoor House Homestyle Recipes