Passionfruit Birthday Sponge

I don't know the history to this sponge, but it's been around my whole life, that much I do know.

For every birthday of my brothers who passed away, we do the passionfruit sponge. That's 3 times a year every year!

And now that Grandma Julie is part of that 'club', she gets the sponge too. Lucky we love it, well I do at least. My family actually isn't quite so keen.