As I mentioned previously, Heston Blumenthal has an incredible though time consuming method for making potato puree. Again I say buy his book for that and other recipes and discoveries. My newest adaptation of the recipe involves using the Thermomix to make the potatoes. It keeps everything in order and monitor temperature as well. Sure, some say why buy an expensive appliance and a book to make potatoes? My point is that these potatoes become simple and even more functional with a Thermomix. If you have one, make these potatoes. If you do not, buy the book first and use the potatoes as an excuse to buy the Thermomix.