Preheat oven to 450 degrees.
Chop the cauliflower into small pieces
Roast cauliflower until slightly browned
Reduce heat to 350
Add ΒΌ cup of buffalo sauce, cream, cream cheese, cheddar, Monterey jack, salt, and pepper and stir well until the cheese has melted fully, about 3 minutes.
Add the chicken and remaining buffalo sauce to a small bowl and toss to coat.
Combine with the cauliflower mixture.
Spread mixture into greased 9x9 baking dish and bake for 15 minutes, or until hot and bubbly.
Sprinkle with green onions before serving.