Plant I.D. ?

Just returned from a moooch along the Boonoo Boonoo river valley behind Stanthorpe,
granite slabs were lovely & warm to lie on, tannin coloured water running clear,
the volcanic Basalt Dyke marked on the map was located, edible prickly pears were fruiting & this strange bright yellow coloured fruit
caught my eye...native passionfruit ? native cucumber ?....any ideas ?
Ooroo,
Ofuros.
granite slabs were lovely & warm to lie on, tannin coloured water running clear,
the volcanic Basalt Dyke marked on the map was located, edible prickly pears were fruiting & this strange bright yellow coloured fruit
caught my eye...native passionfruit ? native cucumber ?....any ideas ?

Ooroo,
Ofuros.