Preheat oven to 300°F. Line a baking sheet with parchment paper.
In a large bowl, combine almonds, walnuts, and pistachios.
In a small microwaveable-safe bowl, combine honey, oil, chipotle powder, cayenne, and cinnamon. Warm mixture over in microwave for 10 second increments, stirring well after each increment, until warmed through. Pour honey mixture over nuts and stir with until thoroughly coated.
Spread mixture in a single layer on prepared baking sheet. Sprinkle with salt. Bake 20 to 25 minutes, stirring every 10 minutes, until golden brown.
Transfer warm mixture to a large bowl. Add cereal and toss to combine.
To serve, combine 1/4 cup nut mixture with 1/4 cup fresh blueberries.
Store nut mixture in an airtight container for up to 1 week.