Courtney Rolston from Cooking with Coles demonstrates how to prepare and glaze a Coles single smoked beechwood ham for Christmas. The technique involves removing the skin, scoring the fat in a modern pattern, and applying a homemade glaze made with orange marmalade, Dijon mustard, allspice, brown sugar and soy sauce. The ham is baked at 180 degrees for approximately one hour and 15 minutes, with glazing every 15 minutes.