Preheat the oven to 350 degrees and prepare a baking sheet with parchment.
In a medium bowl, mix oats, nuts, sugar, salt and cinnamon.
In a small bowl, combine maple syrup, vanilla extract and mashed banana.
Add banana mixture to the dry ingredients and mix thoroughly until combined.
Spread mixture evenly onto the baking pan.
Bake for 35-40 minutes using a fork to stir the granola around every 10 minutes.
Remove from oven and let granola cool on the pan.
Granola can be stored in an airtight container in the fridge for three weeks!