Spread your slices of bread with butter
Mash banana using a fork until it's mushy and smooth
Add a pinch of cinnamon to the banana and mix through
Place two pieces of bread, butter side down, into your sandwich press
Spread banana and cinnamon mixture evenly on both slices of bread
Place the other two slices of bread on top, butter side up.
Close the sandwich press and cook until golden brown.
Let them cool for a few minutes before serving.