Buffalo Chicken Casserole

Preheat oven to 450°. In a baking dish, toss cauliflower florets with olive oil and season with salt and pepper. Bake until tender, 20 minutes. Reduce oven temperature to 350°. Meanwhile, in a medium bowl, stir together cream cheese, buffalo sauce, ranch, green onions, and garlic powder until combined. Set aside. Toss rotisserie chicken with roasted cauliflower in baking dish and spread cream cheese mixture on top. Top with cheddar and gouda and bake until cheese is completely melted and bubbly, 20 minutes. Let cool 10 minutes, then drizzle with ranch and garnish with green onions or chives and serve.