Combine the cinnamon, butter and sugar in a frying pan over medium-high heat until melted and combined.
Add the banana slices and cook for 4 minutes until the bottoms start to caramelize and turn golden brown. Adjust the temperature and cooking time as needed so that they don't burn.
Flip all the banana pieces and cook for another 4 minutes until the other side is golden brown.
Deglaze Pan with Rum until alcohol is evaporated
Serve immediately over your favorite bread, granola or by itself!