Everyone loves Donna Hay's Panna Cotta.
Place the water in a small bowl and sprinkle over the gelatine.
Set aside until the gelatine has absorbed the water.
Place the cream and sugar in a saucepan over medium heat and stir to dissolve the sugar.
Add the gelatine and stir to dissolve.
Remove from heat and stir through the vanilla and buttermilk.
Pour mixture into 4 glasses and refrigerate for
3 hours or until set. Serve with passionfruit.