Mashed Cauliflower

Really wanted to do something fun with that stunning cauliflower, but kind of ran out of time, so I steamed up the whole head of it.  I gave some plain steamed cauliflower to Ed, because that's how he likes it.  Then I used the rest to make cheesy mashed cauliflower.  While the cauliflower was steaming, I sauteed some diced onion in butter.  I drained the steaming water, added a dash of milk, the butter and onions, and some mixed shredded cheese.  Then I mangled it all up with my immersion blender and added a touch of salt and some pepper.  Pretty tasty.