Place the head of cauliflower on a cutting board, and slice it top-down into ¼-inch slices, some of which will crumble.
Toss cauliflower in a large bowl with plenty of olive oil and a bit of salt, spread it in a single layer on a heavy sheet pan (or two, if one looks crowded), and roast until golden brown and caramelized, turning bits and slices once or twice, about 25 minutes. Devour.