Preheat oven to 300°F and line a baking sheet with parchment paper or silicone mat.

In a large bowl, combine oats, nuts/seeds, cinnamon, salt, and chia/flax if using.

In a microwave-safe bowl, melt coconut oil. Stir in maple syrup and vanilla.

Pour wet mixture over dry mixture; stir until well coated.

Spread evenly on the prepared baking sheet.

Bake for 30 minutes, stirring halfway, until edges turn golden.

Let cool completely before storing in an airtight container.