Although I love margaritas and mojitos, last year, after moving to Israel, I decided to experiment.
I took some passion fruit and froze them
After freezing, scoop out the insides, then fill blender with fresh OJ or grapefruit juice. (pineapple would work, but didn't have any fresh here. Would have liked a touch of lime juice too, but same story).
A few glugs of dark anejo rum. Folks with a sweet tooth may want to add some brown sugar.
Blend it--don't put any ice in it, the passion fruit will cool it off.