Beef Braised in Rooibos Tea with Sweet Potatoes

Rooibos tea is an herbal infusion from South Africa. Also called red tea, redbush tea, or honeybush tea, it is honey-flavored and light colored. It is gaining popularity because it is low in bitter tannins and caffeine-free. It can be substituted in this recipe by black tea, or try another dark herbal tea such as one containing licorice.