Horseradish possesses an unforgettable flavor and has been used for thousands of years as both a vegetable and herb. Today, you'll probably see it used most frequently as a pungent condiment often served with steak or roast beef. Besides tasting good (if you like spicy condiments), horseradish also packs in quite a few health benefits. If you've ever tried it, you've probably already experienced its sinus-clearing ability for yourself.