For the amount of work required, the outcome was not that great. This is one of the few in Eating Well that I didn't find true to active time.
From EatingWell: January/February 2012
This refreshing chilled Key lime mousse is a perfect union of cream and foam, tangy lime and soft sweet custard. The method is simple but a little unusual—you make a custard with fresh Key lime juice rather than milk or cream. Key limes, which are about the size of a Ping-Pong ball, are wonderfully fragrant and more acidic than regular limes. They are available all year at well-stocked supermarkets. If you can’t find them, by all means use regular limes.