I am a culinary student and this semester I am taking a class on product identification. One of our large assignments is to write a paper about ten ingredients that we are not familiar with, how they would be used, what they are like, where you can buy them, etc. I have been doing research on lots of cool ingredients... but I would like to know what real foodies use in their recipes. It's always more informative and more interesting to find out from people who know what they're talking about. What's the most unusual ingredient you use in your cooking? What's your favorite secret ingredient?