Yummie! I think your idea of fermenting and adding Passion Fruit juice at the end sounds delicious, too. I wonder if fermenting some mango or apple along with it would taste good? I loved the way my apple tasted in the sauerkraut.
If the fruit is fully fermented, it loses it's sweetness but keeps it's bouquet of flavor.

I need some advice on fermenting though. I'm confused by all the info available.