Preheat oven to 375°F.
Divide green beans evenly between two steam table pans.
Combine Ultimate White Cheese Sauce with onion powder and pepper.
Divide cheese sauce mixture evenly between two pans and spread over beans.
Combine Mozzarella and fried onions. Divide evenly.
Top each pan with cheese and onion blend.
Cover with foil. Bake 50 minutes, until casserole reaches 165°F for 15 seconds.
CCP: Heat to 165°F for at least 15 seconds
Remove foil. Bake an additional 10 minutes until the topping is golden.
Serve immediately or hold warm until service.
CCP: Maintain hot food at 135°F or above