Step 1: Preheat your oven to 300°F (150°C). Line a large baking sheet with parchment paper.
Step 2: In a very large mixing bowl, combine the rolled oats, chopped nuts, seeds, optional cinnamon, and optional sea salt. Stir well to ensure even distribution.
Step 3: In a separate, microwave-safe bowl or small saucepan, combine the maple syrup (or honey), melted coconut oil, and vanilla extract. Whisk them together until thoroughly combined.
Step 4: Pour the wet mixture over the dry oat and nut mixture. Mix thoroughly with a large spatula or your hands until all the oats, nuts, and seeds are evenly coated.
Step 5: Transfer the coated granola mixture onto the prepared baking sheet. Spread it out into an even layer. For larger clusters, gently press the mixture down. Bake for 15 minutes, then carefully remove the pan, stir the granola, and return to the oven for another 10-15 minutes, or until golden brown and fragrant. (For bigger clusters, skip stirring the last 10 minutes and let cool completely undisturbed).
Step 6: Once the granola is golden brown, remove it from the oven and let it cool completely on the baking sheet on a wire rack. It will crisp up significantly as it cools. Once completely cool, stir in your desired dried fruits.
Step 7: Break the cooled granola into desired chunks. Transfer it to an airtight container. It will stay fresh and crunchy for up to 2-3 weeks at room temperature.