Scalloped Potatoes with Caramelized Onions and Gruyere

Made this as part of our Christmas dinner (Roast Beef, Wine/auJus reduction, haricots and these potatoes). The caramelized onions are the magical ingredient here. Though there's no butter or cream (and only a very small amount of stock) the final dish tastes so rich and buttery. It only takes a bit of oil and relatively modest amounts of cheese but it is so satisfying. I think in the future I would increase the amount of onion but otherwise I think this recipe is great as is.