Preheat your oven to 425°F and line a large baking sheet with parchment paper.
Cut the chicken breast into bite-sized cubes and chop the cauliflower into small, uniform florets.
In a large bowl, toss the chicken and cauliflower with half of the melted ghee, sea salt, and black pepper until evenly coated.
Spread the mixture in a single layer on the baking sheet and roast for 20-25 minutes, flipping halfway through, until the chicken is cooked through and cauliflower is tender with charred edges.
While roasting, whisk together the Greek yogurt, dried dill, and garlic powder in a small bowl to create the ranch dipping sauce.
In a separate small bowl, whisk the remaining melted ghee with the buffalo hot sauce.
Once roasted, transfer the chicken and cauliflower to a clean bowl, drizzle with the buffalo mixture, and toss gently to coat.
Serve the buffalo bites immediately with the yogurt dip and fresh celery sticks on the side.