To roast the cauliflower, preheat the oven to 375 degrees F, preferably on convection bake. (If you don't have a convection oven, preheat the oven to 410 to 425 degrees F.) Toss the cauliflower florets with 2 tablespoons olive oil and 1/2 teaspoon kosher salt. Roast on a parchment-lined baking sheet until very tender and dark golden brown, 35 to 45 minutes. Cool before adding to the dough.