Preheat your oven to 400°F and line a large baking sheet with parchment paper to prevent sticking.
Cut the chicken breast into bite-sized cubes and place them in a large mixing bowl along with the cauliflower florets.
Drizzle with avocado oil and sprinkle with almond flour, sea salt, black pepper, and garlic powder, tossing until everything is evenly coated.
Spread the chicken and cauliflower in a single layer on the prepared baking sheet, ensuring they aren't overcrowded so they can crisp up.
Roast for 20 to 25 minutes, flipping halfway through, until the chicken is cooked through and the cauliflower edges are golden brown.
While the tray is roasting, whisk together the Greek yogurt, dried dill, and lemon juice in a small bowl to create a clean-label ranch dip.
Remove the tray from the oven, transfer the hot chicken and cauliflower to a clean bowl, and toss gently with the buffalo sauce.
Serve immediately with the chilled ranch dip on the side for dipping.