Steps
1. In a small bowl, mash the ripe banana until smooth.
2. In another bowl, whisk together the egg, sugar, cinnamon, and salt until well combined.
3. Add the mashed banana to the egg mixture and stir until fully incorporated.
4. Heat a skillet over medium heat and add the butter, allowing it to melt.
5. Dip the slice of bread into the banana-egg mixture, ensuring both sides are coated.
6. Place the bread in the skillet and cook for about 3-4 minutes on each side, until golden brown.
7. Serve warm, optionally topped with additional banana slices or a sprinkle of cinnamon.