Preheat the oven to 170°C (338°F).
Place oats, nuts, and seeds in a large bowl and mix well.
Add coconut oil, maple syrup, cinnamon powder, and salt. Mix until evenly coated.
Spread the mixture evenly on a baking pan.
Bake in the oven at 170°C (338°F) for 20–25 minutes, stirring once halfway through.
Let it cool completely and store in an airtight container.