[header] How to make cauliflower cheese [title] Preheat the oven. [step] To ensure that your oven is properly heated when the cauliflower cheese casserole is ready to bake, it's important to preheat it. Set the temperature to 400 degrees fahrenheit (200 degrees celsius), and allow it to fully heat. 
[substeps] Keep an eye on your oven so you know when it's reached the correct temperature. Most models will sound an alert or flash a light to let you know that they're preheated.