My first reaction was "Ewwwwww!" before I whipped out the cell phone and snapped a couple of pictures. It had the texture and color of a lemon. A label slapped on the thing told me it was Buddha Hand.
Wikipedia offers more pics and some very interesting tid-bits:
The fruit may be given as a religious offering in Buddhist temples. According to tradition, Buddha prefers the "fingers" of the fruit to be in a position where they resemble a closed rather than open hand, as closed hands symbolize to Buddha the act of prayer.
The origin of Buddha's Hand is traced back to Northeastern India and is believed to be the first citrus fruit known in Europe. It is speculated that the Greeks and Romans brought them back from Asia.