In a small saucepan over medium heat melt the butter. Stir in the brown sugar and bananas. Bring to a boil.
Remove from the heat. Stir in rum.
Preheat the oven to 350 degrees.
In a large bowl, combine the flour, chia seeds, baking soda, baking powder, salt, and cinnamon.
In another large bowl, whisk the eggs, yogurt, and banana mixture.
Stir the dry ingredients into the banana mixture and mix until just combined.
Pour the batter into a loaf pan coated with cooking spray.
Bake at 350° for 50-55 minutes or until a toothpick inserted in the center comes out clean.
Cool for 10 minutes then run a knife around the edges of the pan and remove the bread to cool completely on a wire rack.
To make the glaze whisk together the powdered sugar, vanilla, and rum. Drizzle over top of the cooled bread.