Although it may seem like it, kale isn't a new vegetable. Thomas Jefferson experimented with several varieties of kale at his Monticello estate in the early 1800s. It's long been popular in northern Europe and now throughout the U.S. Before becoming a popular salad green, kale was often used in restaurants as a decorative garnish on plates.
But over the past 10 years, the popularity of kale has skyrocketed. You've probably heard it referred to as a superfood. Here's more about its not-so-secret powers.
Types of kale include:
