OVER the past couple of years, has there been a South African Cabernet Sauvignon producer more successful on the world stage than the Ellis family on the Helshoogte Pass, Stellenbosch? Their current-release 2015 Jonkershoek Cab won gold medals at the Decanter awards and International Wine Challenge (IWC) after one of the most outstanding reviews on Winemag.co.za – this after the 2014