Preheat oven to 350 degrees F.
Grease bread pan.
First, mash up the bananas. By hand with a fork or using a stand mixer.
Add in the sugar, egg, butter, and vanilla.
Then, add the flour, salt, baking soda, and cinnamon.
Mix for a couple of minutes until smooth.
Pour batter into the bread pan and bake for 50-60 minutes. Check with knife to see if it's done. If the knife comes out clean, it's ready to come out of oven.
Remove from oven and let cool a few minutes.
Slice and serve with butter!