Preheat the oven to 425°F and line a large baking sheet with parchment paper for easy cleanup.
In a large mixing bowl, combine the cubed chicken breast and cauliflower florets with almond flour, garlic powder, onion powder, sea salt, and black pepper.
Toss the mixture thoroughly until every piece is evenly coated, then spread them in a single layer on the prepared baking sheet.
Roast for 20 to 25 minutes, flipping halfway through, until the chicken is golden and the cauliflower is tender with crispy edges.
While the base roasts, whisk together the Greek yogurt, dried dill, and lemon juice in a small bowl to create a creamy ranch dip.
In another small bowl, whisk the melted ghee and buffalo sauce together until emulsified.
Remove the tray from the oven, transfer the chicken and cauliflower to a clean bowl, and toss with the buffalo ghee sauce until glistening.
Serve immediately with the chilled yogurt ranch on the side.