I am fascinated with umami. As a person who always needs to know "why" I first discoered it in my quest to figure out why I craved mushrooms. It didn't make sense to me that I would crave some random fungus, but then i learned that they are chock full of umami which probably also explains why that dash of Parmesan seems to do something even though I can't explain it or I can inhale a pint of grape tomatoes without figuring out why. While I understand the chemistry, unlike the other "Big 4" - sweet, sour, salty and bitter - it is unique in that I can't seem to describe it in words. What is umami to you? How would you describe it?