Preheat your oven to 425°F (220°C) and line a large baking sheet with parchment paper.
Cut the chicken breast into bite-sized cubes and ensure the cauliflower is broken into similar-sized florets.
In a large bowl, whisk together the melted ghee, buffalo hot sauce, garlic powder, onion powder, sea salt, and black pepper.
Add the chicken cubes and cauliflower florets to the bowl, tossing thoroughly until every piece is evenly coated in the buffalo mixture.
Spread the mixture in a single layer on the prepared baking sheet, ensuring space between pieces for optimal roasting.
Bake for 18-20 minutes, flipping halfway through, until the chicken is cooked through and the cauliflower is tender with charred edges.
While the bites roast, prepare the dip by stirring together the Greek yogurt, blue cheese crumbles, and lemon juice in a small bowl.
Slice the celery stalks into sticks to serve on the side.
Remove the tray from the oven and serve the hot buffalo bites immediately with the chilled blue cheese dip and crunchy celery.