Preheat your oven to 350 degrees.
In a large bowl, add flour, baking soda, and salt, and whisk together. Set aside.
Add your eggs, granulated sugar, oil, sourdough starter, and vanilla extract to your stand mixer and mix until well combined.
Gradually mix the dry ingredients with the wet ingredients.
Next, mash up 2 - 3 bananas in a bowl and chop any inclusions you would like to add. I added walnuts, but you can add anything you prefer.
Add the mashed bananas to the mixer until everything is well combined.
Fold in your walnuts and other inclusions with a silicone spatula to prevent over-mixing.
Oil your loaf pan, and add your banana bread batter to the pan.
Bake at 350 degrees for 50 - 60 minutes, or until golden brown.
Stick a toothpick or a knife in the center of the loaf to see if it's done. If it comes out clean, your loaf is done baking.
Allow your banana bread to cool for 5 - 10 minutes and enjoy!