After boiling I put the cauliflower in a culinder/strainer, and mash it with a pastry masher. This also pushes the extra water out. Then I put the cauli into a casserole dish and mash it up with whatever of these ingredients I have that day--so it's a little different every time:

cream cheese
butter
mayo
sour cream
chives
shredded cheddar
bacon bits

They are not super-creamy, but more like the texture of "smashed potatoes."

Sprinkle with Mrs. Dash.
Then bake for 45-60 minutes.