I tried this the other night and am now addicted.

Steam some broccoli until very tender
Mash well along with about an ounce of cream cheese and a few tbs grated strong cheddar.
Salt and pepper to taste

That's it!

I added some butter because it was a bit thick. I really loved it. I used a hand potato masher though I imagine pulsing in a food propcessor would work too.