Preheat oven to 300°F (150°C) and line a baking sheet with parchment. Whisk the melted coconut oil, maple syrup, vanilla, and salt in a large bowl until uniform.

Add the rolled oats and stir for about 1 minute until every oat is fully coated and no dry spots remain.

Spread the mixture onto the prepared baking sheet in an even layer, press down firmly, and bake for 25 minutes. Rotate the pan and bake 10 to 15 minutes more until the edges are deeply golden and the surface looks dry.

Let the granola cool completely on the baking sheet, then break it into clusters with your hands and store in an airtight container.