Preheat oven to 350° and grease a bread baking dish.
Mash bananas with a fork in a large mixing bowl. Leave a few little lumps.
Whisk in eggs, sugar, melted butter, and vanilla extract until all mixed.
Add flour, baking soda, cinnamon, and salt and gently whisk until the batter is smooth and everything is evenly combined.
Fold chopped walnuts to the batter.
Transfer batter into the prepared baking dish. Bake for 55-60 minutes. If the top of bread is browning too fast, loosely cover with aluminum foil to keep direct heat away.
Do a toothpick check and if need to bake longer, bake a few more minutes if needed.
Take bread out and let it cool before cutting. Use serrated bread knife to slice the bread.