This granola is great served with additional bananas and yogurt or in a simple bowl with milk. Pecans or cashews would be a great substitution for the walnuts and almonds.
Preheat oven to 350 degrees and line a baking sheet with parchment paper.
In a large bowl combine oats, walnuts, almonds, flax, cinnamon, and salt. In a separate bowl combine melted coconut oil, maple syrup, vanilla, and mashed banana.
Add banana mixture to oat mixture and stir until oats are coated with the wet mixture. Spread out evenly on a baking sheet and bake for about 28 minutes or until brown, stirring once. Set aside to cool and store in a sealed container.