Preheat oven to 325°F. Line a rimmed baking sheet with parchment paper.
Combine oats, pecans, almonds, cinnamon, salt, and brown sugar in a large bowl.
Warm honey, peanut butter, and olive oil together until smooth and pourable. Remove from heat and stir in Mapleine or vanilla.
Pour over dry ingredients and mix until everything is well coated.
Spread onto prepared baking sheet in an even layer. Press down firmly with a spatula to help form those big clusters!
Bake for 30 minutes, rotating the pan halfway through. DO NOT STIR!
For extra crunch, turn off the oven and leave the granola inside with the door cracked open for 10–15 minutes.
Cool completely on the baking sheet before breaking into chunks.
