Preheat your oven to 325°F / 160°C. Line two baking sheets with parchment paper.
In a large bowl, whisk the applesauce, maple syrup, and olive oil together.
Add the oats, walnut pieces, salt, and cinnamon. Mix well.
Divide the mixture amongst the two prepared baking sheets, and spread into an even layer.
Place the baking sheets into the upper and lower thirds of your oven, and bake for 10 minutes. Remove from the oven, lift the edges of the parchment to slide the granola into the center of the pan, and stir the granola. Return the granola to the oven and rotate the pans.
Bake for another 10 minutes before stirring the granola and rotating the pans again.
Bake for another 10 minutes. Watch it carefully this time - I find the pan on the bottom has a tendency to burn. The granola should be golden, but not dark brown.
Remove from the oven and let cool completely before spooning the granola into glass jars.