Preheat your oven to 425°F (220°C) and line a large rimmed baking sheet with parchment paper for easy cleanup.
Dice the chicken breast into 1-inch bite-sized pieces and break the cauliflower into small, uniform florets.
In a large mixing bowl, combine the chicken and cauliflower with the olive oil, garlic powder, onion powder, sea salt, and black pepper, tossing until every piece is evenly coated.
Spread the mixture onto the prepared baking sheet in a single layer, ensuring there is space between the pieces to allow for proper roasting.
Roast in the oven for 18 to 20 minutes, or until the chicken is cooked through and the cauliflower is tender with slightly charred, golden edges.
While the tray is roasting, prepare the dip by whisking together the Greek yogurt, blue cheese crumbles, and lemon juice in a small bowl until well combined.
Remove the baking sheet from the oven and transfer the roasted chicken and cauliflower back into the large bowl; toss immediately with the buffalo sauce until fully glazed.
Serve the hot buffalo bites on a plate with the creamy blue cheese dip on the side for dipping.