Mashed Cheesy Cauliflower

I LOVE mashed potatoes...but I realize I shouldn't be eating them in mass quantities.  So, I wanted to try mashed cauliflower.  This recipe calls for adding cheese to thicken up the consistency but eventually I'd like to see if I can cut the calories in this.  It's to die for and honestly, I crave it!!  I've made them 2x in less than a week.  (UGH...better figure out the less calorie version soon!)

I "eye-ball" the amounts of cheese, margarine and milk but I end up with a similar consistency to mashed potatoes.

(the pic doesn't do it justice!)

Ingredients:
1 head of cauliflower, separated into florets
1 can chicken stock
Margarine
Parmessan Cheese
Shredded Cheddar Cheese
Milk
Salt & Pepper

Directions:
Place cauliflower florets in a pan with 1 can of chicken stock and 1 soup can of water (you can add as much water as needed to cover the cauliflower)
Bring water to a boil then cover and turn back the heat to a simmer. 
Simmer for 10 minutes, then drain
Place drained cauliflower in a bowl that you can use beaters
Add margarine; milk & cheese - a little at a time to ensure you get the right consistency (I never measure this it's just eye balled).  They should look like mashed potatoes
Season with salt & pepper
Serve immediately