Back in Bangladesh, when Aziz Osmani moved from an island village to a high school in nearby Chittagong, he had his first taste of Rooh Afza, something of an invented Ramadan tradition in the subcontinent???it???s a scarlet syrup first concocted by an Indian beverage company in 1907, consisting of rosewater, mint, cilantro, watermelon, carrot and other ingredients in a top-secret ratio. (Rooh Afza