Step 1: Preheat your oven to 300°F (150°C). Line a large baking sheet with parchment paper or a silicone baking mat to prevent sticking.
Step 2: In a large bowl, combine the rolled oats, mixed nuts, and mixed seeds. Stir them well to ensure everything is evenly distributed.
Step 3: In a separate small bowl or liquid measuring cup, whisk together the maple syrup (or honey), melted coconut oil (or olive oil), vanilla extract, ground cinnamon, and sea salt. Make sure the coconut oil is fully melted.
Step 4: Pour the wet mixture over the dry ingredients in the large bowl. Stir thoroughly with a spatula until all the oats, nuts, and seeds are evenly coated.
Step 5: Transfer the granola mixture to your prepared baking sheet. Spread it out into a single, even layer. If necessary, use two baking sheets to avoid crowding, which ensures even toasting.
Step 6: Bake for 15 minutes, then remove from the oven and give it a gentle stir. Spread it back into an even layer and return to the oven.
Step 7: Continue baking for another 10-15 minutes, or until the granola is golden brown and fragrant. Keep a close eye on it during the last few minutes to prevent burning.
Step 8: Once golden, remove the baking sheet from the oven. Let the granola cool completely and undisturbed on the baking sheet. This is crucial for achieving those delightful crunchy clusters.
Step 9: Once completely cool, gently break the granola into desired clusters. If adding dried fruit, stir them in now. Transfer to an airtight container for storage.