Preheat oven to 350 °F (177 °C) and line a large rimmed baking sheet with a silicone baking mat or parchment paper.
In a large bowl, whisk together the oats, pumpkin seed, coconut flakes, and chia seeds. In a medium bowl, whisk together the pumpkin, coconut oil, maple syrup, salt, and pumpkin spice.
Pour the liquid into the large bowl with the oats and mix and toss together with a spatula.
Spread into an even layer on the prepared baking sheet and bake for 15 minutes. Then remove from oven and stir around then bake for another 15 minutes.
Remove from oven and it will start to harden and crisp up as it cools.
Store in a plastic bag or glass container for up to seven days.