Preheat the oven to 325°F (163°C). Line a large rimmed baking sheet with parchment paper.
Mix the dry ingredients. In a large mixing bowl, combine the rolled oats, chopped pecans, cinnamon, and salt.
Mix the wet ingredients. In a separate small bowl or measuring cup, whisk together the honey, melted coconut oil, and vanilla extract until smooth.
Combine everything. Pour the honey mixture over the oat mixture and stir until all of the oats and pecans are evenly coated.
Spread onto the baking sheet. Transfer the mixture to the prepared baking sheet and spread it into an even layer. Gently press it down with the back of a spatula if you'd like larger granola clusters.
Bake for 25–30 minutes, stirring once halfway through, until the granola is lightly golden brown and fragrant. Keep an eye on it during the last few minutes to prevent over-browning.
Cool completely. Remove the baking sheet from the oven and let the granola cool completely without stirring. As it cools, it will become crisp and develop crunchy clusters.
Add optional mix-ins. Once the granola has cooled, stir in any desired add-ins such as dried cranberries, chocolate chips, coconut flakes, or seeds.
Store and enjoy. Transfer the granola to an airtight container or glass jar. Enjoy it with yogurt, milk, smoothie bowls, fresh fruit, or simply by the handful as a snack.