kohlrabi-beauty-01-mld106124.jpg If you've ever passed by kohlrabi at the farmer's market, you may have mistaken it for a radish, a giant Brussels sprout, or even a rutabaga. Sometimes referred to as a German turnip, kohlrabi comes from the Brassica oleracea family, which includes broccoli, cauliflower, kale, collard greens, and Brussels sprouts. It's a cool-weather crop that's at its best from early fall through spring. When shopping for this vitamin C-rich vegetable, choose kohlrabi with unblemished leaves and a bulb that's three to four inches in diameter; the bulb should not appear cracked or overgrown. Leaves that are wilted are a sign that the vegetable is past its peak, but if they're still in their prime, they're completely edible.