Preheat 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 the olive oil, sea salt, black pepper, garlic powder, and onion powder until evenly coated.
Spread the mixture in a single layer on the prepared baking sheet and roast for 20-25 minutes until the chicken is cooked through and the cauliflower is golden and crispy.
While the tray is roasting, melt the ghee in a small saucepan over low heat and whisk in the buffalo sauce until smooth.
In a separate small bowl, stir together the Greek yogurt and lemon juice to create a creamy dipping sauce.
Once the roasting is complete, transfer the chicken and cauliflower to a clean bowl and toss thoroughly with the buffalo-ghee mixture.
Garnish the bites with fresh chives and serve immediately alongside the cooling yogurt dip.