From Cookingintheory.BlogSpot.com Takes about 10 minutes to prepare; needs to rest overnight. Save the greens for another use.

Slice the turnips in half lengthwise, then slice each half into 1/8" half circles. Set aside. Put all of the other ingredients into a container with a tight-fitting lid. Put the lid on and shake vigorously until the sugar is dissolved. Add the turnips and mix well. Cover and refrigerate overnight. They will be ready the next day, and will get stronger with time.