I wanted to give this recipe (from the Good Housekeeping Christmas magazine) a trial run as I'm considering doing it for Christmas. I didn't follow it exactly as I didn't have everything thing in (e.g. dried thyme instead of fresh, orange juice rather than squeezed oranges). I also only did one leg, but kept the quantities for the marinade and stock the same. However when I opened the oven after about 3 hours the juices were pretty much gone, and what was left had turned black and stuck to the bottom of the roasting tin. Did I just not adjust the timings enough for the fact that I was only doing one leg, or does anything else look amiss about the recipe?