Preheat oven to 150-160℃ and line a baking tray with baking paper.
In a large bowl, combine the oats, nuts, seeds, salt and vanilla and set aside.
Mix the coconut oil, maple syrup and mashed bananas until well combined and smooth.
Add the wet ingredients to the dry and mix together with your hands.
Spread the mixture evenly on the baking tray and bake for approximately 20-30 minutes, depending on your oven.
Keep checking and turning as the muesli cooks to make sure it doesn't burn. Remove from the oven when it's a golden brown colour throughout, and allow to cool.
Store in glass jars.
Notes
The oven temperature needs to be fairly low, so the muesli will cook evenly without burning.
Take the tray out of the oven every 5-10 minutes and turn the mixture to make sure that it's all cooked through.