Preheat your oven to 425°F and line a large rimmed baking sheet with parchment paper for easy cleanup.
Cut the chicken breast into 1-inch bite-sized cubes and chop the cauliflower into small, uniform florets.
In a large mixing bowl, combine the chicken and cauliflower with avocado oil, sea salt, black pepper, and garlic powder, tossing until every piece is well coated.
Spread the mixture in a single layer on the prepared baking sheet, making sure not to overcrowd the pan so the ingredients roast rather than steam.
Roast for 20 to 25 minutes, flipping the pieces halfway through, until the chicken is cooked through and the cauliflower edges are golden and crispy.
While the tray is in the oven, whisk together the Greek yogurt, dried dill, and lemon juice in a small ramekin to create the cooling dipping sauce.
Once roasted, transfer the chicken and cauliflower to a clean bowl and toss immediately with the buffalo sauce until fully glazed.
Serve the crispy bites on a plate with the creamy yogurt dip on the side for a protein-packed meal.