Truffle Vinegar: Use to season salads, prepare vinaigrettes and sauces, brush on grilled meats, deglazing, and replace in any recipe that calls for vinegar (note: most truffle vinegars are prepared based on a Balsamic or wine vinegars)
I would avoid cooking with it as the truffle flavour will disappear as the volatile oils evaporate. As others have said maybe use in salad dressing or at the very end of cooking for seasoning things like puy lentils or other pulses.