Preheat the oven to 325 degrees F.

In a large bowl, whisk together the olive oil, sea salt, maple syrup, brown sugar, pumpkin puree, and pumpkin pie spice.

Add oats, walnuts, sunflower seeds, and sesame seeds to the bowl. Mix well.

Spread the granola mixture out in one even layer on a large baking sheet lined with parchment paper. Bake for 20 minutes and then remove from oven and mix. Bake for another 15 to 20 minutes until golden.

Completely cool granola on the baking sheet before transferring to an air-tight container. Granola will last up to two weeks.