By roasting the cauliflower for this purée, we bring out deep, nutty flavors. The resulting dish has a complex flavor that's suited to more of a starring role in a dish—say, as a bold accompaniment to a simple piece of protein, like steamed or poached fish or chicken. Alternatively, you could go all in on its more robust flavor, serving it with something that can stand up to it, like a thick, juicy steak with a deeply seared crust.