Preheat the oven to 350° Fahrenheit and grease a bread pan with butter or cooking spray.
Cream together the butter and sugar. I like to use a stand mixer for this but you can also do it by hand (or with a hand mixer).
Add the eggs, mashed banana, passion fruit and vanilla extract to the butter and sugar and mix to incorporate.
In a medium sized bowl, sift together the flour, baking soda, and salt. Then add this dry mixture to the wet one and stir until just combined, being careful not to overmix.
Pour batter into greased bread pan. Add garnishes if using. For this loaf I used a bunch of edible flowers and a half a banana sliced lengthwise, but both are completely optional.
Bake for about 1 hour and 15 minutes, or until the top is brown and shiny and when you place a toothpick through the middle it emerges clean. Then remove from the oven and move to a cooling rack for about 20 minutes before slicing!