Preheat your oven to 425°F and line a large baking sheet with parchment paper.
Cut the chicken breast into bite-sized pieces and ensure the cauliflower florets are uniform in size.
In a large mixing bowl, toss the chicken and cauliflower with the arrowroot starch, half of the garlic powder, half of the onion powder, salt, and pepper until evenly coated.
Spread the mixture in a single layer on the prepared baking sheet and roast for 20-25 minutes, flipping halfway through, until the chicken is cooked through and the cauliflower is tender with crispy edges.
While roasting, whisk together the Greek yogurt, lemon juice, dried dill, and the remaining garlic and onion powder in a small bowl to create the ranch dip.
In a separate small bowl, melt the ghee and whisk in the buffalo hot sauce until smooth.
Once the chicken and cauliflower are done, transfer them to a clean bowl and toss with the buffalo ghee mixture until fully glazed.
Serve the warm buffalo bites immediately with the chilled ranch dip on the side.