Preheat the oven to 350F/180°C. Line a baking sheet with a baking mat or parchment paper. Set aside.
In a large mixing bowl, stir in the oats, nuts, seeds, salt, cinnamon, coconut oil, honey, and vanilla extract with a spatula. Mix until the dry ingredients are lightly coated.
Pour the granola onto your prepared pan and use a large spoon to spread it in an even layer.
Bake for 20-25 minutes, stirring halfway through, until golden brown. Add coconut flakes 5 minutes before the granola finishes baking.
Let the granola cool completely undisturbed for clumpy granola or stir occasionally if you do not want clumpy granola. Top with the dried fruit/chocolate chips if using. Store granola in an airtight container.
Notes
Keep your batch of granola in an airtight container on the counter or in the pantry for up to one month.