One of my new (for me) favourite foods is roasted cauliflower.
Take the cauliflower and break into florets. I then cut the florets in half so that I get better caramelisation and a better looking dish.
Heat a pan and add butter. I usually add a little olive oil to reduce the risk of the butter burning.
I pan fry the cauliflower with lots of foaming butter, before transferring to a heated roasting pan for 10-15 minutes.
If you have an ovenproof pan then, put that straight into the oven.
I sometimes use a grill seasoning to add additional flavour.