Prepare rice according to recipe, omit salt. Preheat oven to 350 degrees. Rinse and pat dry fish. Spray a shallow baking dish with cooking spray and place fish in baking dish. Combine remaining ingredients in a small bowl, mixing well so that tomato paste dissolves completely. Pour mixture over fish and bake for about 20 to 25 minutes until fish flakes, uncovered (do not overcook.) Serve with rice.