Diverse white wines from classic Bordeaux-style elegance to unusual blends from pockets of gnarled vines in the Swartland and Franschhoek take centre stage at Grande Provence Heritage Wine Estate on Friday, 23 September for their monthly Wine & Dine Collaboration.   Teaming up with David & Nadia, Constantia Uitsig and Oak Valley Wines, Grande Provence cellarmaster Matthew…