In a large bowl use a fork to smash your bananas.
mix in your sugar, buttermilk, butter, eggs, and vanilla.
Add your flour, salt, baking soda, baking powder, and cinnamon. whisk together
Take your diced up pineapple and using a rag, squeeze out any excess water from them. Add them, coconut, and nuts to your batter. Mix together
Line a loaf pan with parchment paper leaving excess paper hanging over the edge.
Add your batter to pan and then place in the freezer for 20 minutes or the fridge for 2 hours.