First, if you don't know what a Gröstl is - it's an Austrian one pan dish with potatoes, onions, butter schmalz and any leftover meat you want to clean out of the fridge. However the specimen you are looking at here is the super star of the Gröstl world, with it's succulent hunks of fresh roasted duck and the whole kit and caboodle fried lovingly in duck fat... hmmm hmmm hmmm.