Preheat the oven to 325°F (165°C)
Line a baking sheet with parchment paper
Combine rolled oats, nuts, seeds, salt, and cinnamon in a large bowl
In a separate bowl, mix oil, honey or maple syrup, and vanilla extract
Pour the wet mixture over the dry ingredients
Stir until everything is evenly coated
Spread the mixture in an even layer on the baking sheet
Bake for 20 to 30 minutes, stirring once halfway through
Remove from the oven when golden brown
Let the granola cool completely
Add dried fruit or chocolate chips after cooling
Store in an airtight container