So, if Gourmet and Burger together sounded like a culinary oxy-moron, the owners of GBK have pulled it off. The idea of providing excellent food in burger form apparently comes from New Zealand, and to hone their menu (if we'd been more imaginative, we could have gone for Chorizo and Sweet Potato, Venison, or Portabella Mushroom burgers), the restaurant cannily employed the reigning Kiwi King Of Fusion Food, Peter Gordon, founder chef of the Sugar Club.