I've been using a lot of truffle oil recently. I make a roasted chestnut soup, (which is just chopped onions, leeks and roasted chestnut simmered with chicken stock, then pureed) with fried Jerusalem artichokes drizzled with truffle oil. And, a Gnocchi with cream sauce, with shaved pecorino cheese and truffle oil. I served the Gnocchi at a office party recently. Must thank everyone on egullet for giving me all the great tips for re-heating the sauce.