Preheat oven to 325°.
Combine the miso, ghee, maple syrup, and salt in a small mixing bowl and stir to create a paste. Add the walnuts and toss until the nuts are well coated.
Spread the walnuts on a parchment-lined rimmed baking sheet and bake for 10 to 13 minutes, or until caramelized.
Cool to room temperature before serving. Store in an airtight container at room temperature for up to 1 week.
