I got a head of cauliflower on sale the other day, and this is a very quick and delicious thing to do with it.
Cut it into large florets. Put a little olive oil in a roasting dish, and toss the cauliflower to coat. Salt and pepper to taste. Roast at 400 degrees until cooked through. Remove, and toss with paprika (I used pimenton, a smoky Spanish paprika).