This is now my favorite potato gratin of all time. The caramelized onions mixed with the goat cheese gives this dish a very rich flavor. Instead of all of the prep work stated in the recipe, I just use a mandoline to slice the potatoes (with the peel on) and layer the dish with raw ingredients. I have started adding about double the goat cheese called for. These are even good cold the next day. From Gourmet, September 1995.