Preheat the oven to 325 degrees F. Line a baking sheet with parchment paper or a silicone mat.
In a large mixing bowl, combine all the dry ingredients together. Mix well.
In a small saucepan, combine the applesauce, maple syrup, and peanut butter on medium-low heat. Whisk continuously until heated through, just until it starts to simmer. Turn off the heat and whisk in the vanilla.
Pour wet mixture into the large mixing bowl with the dry ingredients. Combine and mix thoroughly with a wooden spoon.
Place mixture onto the pan and spread it evenly throughout. Bake for 15 minutes, then take it out of the oven and give it a quick stir to ensure even baking. Return to the oven and bake for 17-19 more minutes. Check the granola and see if it has a golden color and is mostly dry. Don’t worry if it seems slightly wet and not perfectly crisp yet because it will crisp up even more when it cools. You don’t want burnt granola. Let it cool completely on the pan and enjoy! Store it in an airtight container.