Being a vegetarian at Christmas hardly means you are missing out on a feast, in fact I often find the vegetarian choice is more exciting and tasty than more traditional dishes. The flavours in this Christmas dish are based on the traditional roast with a difference. This dish is simple to prepare but full of flavour and looks great. Don't be put off the idea of the Brussel sprout puree, as it works well and as always Brussel sprouts are delicious when cooked properly.