Preheat your oven to 425°F and line a large baking sheet with parchment paper for easy cleanup.
Dice the chicken breast into bite-sized pieces and toss them in a large bowl with the cauliflower florets, avocado oil, sea salt, black pepper, and garlic powder.
Spread the chicken and cauliflower in a single layer on the prepared baking sheet, ensuring they aren't crowded so they roast rather than steam.
Roast for 20 to 22 minutes, or until the chicken is cooked through and the cauliflower edges are golden and crispy.
While roasting, whisk together the buffalo sauce and melted ghee in a small bowl to create the glaze.
In a separate small bowl, stir together the Greek yogurt, dried dill, and onion powder to create a clean-eating ranch dipping sauce.
Remove the tray from the oven, drizzle the buffalo glaze over the hot chicken and cauliflower, and toss with tongs until every piece is coated.
Serve the buffalo bites immediately with the chilled herb yogurt dip on the side.