Preheat oven to 400 degrees. Lightly coat a 9 by 9 inch baking dish with pan spray and lay fillets in dish. Squeeze lemon and lime juice over fillets and season with next 3 ingredients. Top each fillet with cilantro and tomato. Arrange onion, peppers and garlic slices over fish. Sprinkle brown sugar over evenly. Bake uncovered for 20 minutes or until fish is moist and flaky.