No worries about growing zone, weather, space requirements just your dream garden.
I would love to be able to grow vanilla, they look really cool the flowers smell amazing and having a source of fresh vanilla beans would probably unlock some next level cooking. An olive tree would be cool too, I can eat unlimited olives and making my own oil would be awesome.
avocado, coffee, tomato, star fruit, olive, cannabis, coca, mimosa (I think we have some native wattle that could substitute?), poppy, betel, ephedra, some catci and mushrooms for good measure