1Heat oven to 400°. Heat water to boiling in 2 1/2-quart saucepan over medium-high heat. Cook onion in water, stirring occasionally, until crisp-tender. Stir in rice, tomatoes and Italian seasoning; cook until thoroughly heated.
2Spoon rice mixture into ungreased rectangular baking dish, 13x9x2 inches. Place fish fillets on rice mixture. Brush fish with oil. Sprinkle with paprika.
3Cover and bake 20 to 25 minutes or until fish flakes easily with fork.