Diogo Vaz, a company in the idyllic island of Sao Tome and Principe in West Africa, is producing organic luxury chocolate from rare cocoa varieties. Courtesy: Diogo Vaz By Busani BafanaBULAWAYO, Feb 14 2020 (IPS) A premium chocolate maker in São Tomé and Príncipe is on a drive to promote the taste for “made in Africa”