Ok, I totally stole this recipe from the Internets.
* 1 head cauliflower
* 1/2 cup mayonnaise, reduced fat
* Tablespoon of Ranch dressing
* 1 teaspoon prepared mustard
* 1 teaspoon onion, minced
* 3/4 cup shredded Cheddar or Parm cheese
In a large saucepan, bring water to a boil. Wash, trim and core the cauliflower; break up. Cook in simmering water 12 to 15 minutes until fork tender. Drain well.
In a small bowl, combine mayonnaise,Ranch dressing mustard and minced onion. Spread mixture over cauliflower. Sprinkle with shredded Cheddar cheese.