Preheat the oven to 325°F (163°C) and line a rimmed baking sheet with parchment. In a small bowl, whisk together the peanut butter, honey, melted coconut oil, vanilla, and salt until smooth.

In a large bowl, combine the oats and chopped peanuts. Pour the peanut butter mixture over and stir until evenly coated and clumpy.

Spread the granola onto the prepared baking sheet and press firmly into a compact, even layer. Bake for 20 to 25 minutes, rotating the pan halfway, until deep golden brown. Do not stir.

Let the granola cool completely on the pan on a wire rack. Once cool, break into clusters and store in an airtight container.