Here's a link to Susan Feniger/Mary Sue Milliken passion fruit tart recipe mentioned below. I did find it on the Food Network site, simply by searching first for "Feniger" and then "passion." Hope this is the elusive tart recipe.
Kombucha is all the rage right now. Though the fizzy, sweet, fermented tea has been around for at least a couple hundred years (and possibly much longer), it seems like Americans and Europeans are just beginning to discover the probiotic benefits.