Preheat oven to 325 and place a piece of parchment on a rimmed baking sheet.
In a large bowl, mix together the oats, walnuts, pepitas, and salt.
In a small saucepan set over low heat, warm the maple syrup, brown sugar, olive oil and butter until it’s boiling. Stir in the maple extract and vanilla extract.
Pour the hot syrup over the oats and stir to coat.
Transfer the oat mixture to the prepared baking sheet and spread it into an even layer.
Bake until dry and lightly golden, 20 to 25 minutes, stirring granola 1-2 times along the way (see note about granola clusters).
Remove the granola from oven, sprinkle the raisins (or dried apples) over the granola. Allow to cool to room temperature before transferring to a storage container.