Chicken & Cauliflower-Rice Casserole

Preheat oven to 400°F. Coat a 7-by-11-inch (2-quart) baking dish with cooking spray.

Place cauliflower in a microwaveable bowl. Cover tightly and microwave on High until tender, about 3 minutes. Drain, if necessary.

Combine cream cheese, garlic powder, onion powder, oregano, mustard, pepper, salt, cayenne and ¼ cup scallions in a large bowl; beat with an electric mixer on medium speed until smooth, about 1 minute. Fold in the cauliflower, chicken and 1 cup Cheddar. Spoon the mixture into the prepared baking dish. Sprinkle with the remaining ½ cup Cheddar and cover with foil.

Bake until bubbly, about 30 minutes. Uncover and bake until the cheese browns, about 10 more minutes. Remove from oven and sprinkle with the remaining ¼ cup scallions. Let stand for 10 minutes before serving.