Remove outer leaves and trim the stem flat, leaving the core intact. Slice the head vertically into ¾-inch thick steaks starting from the center. Set aside any loose florets for another use.
1 medium-large cauliflower head
Brush each steak generously with olive oil on both sides (about 1 tablespoon per steak). Evenly sprinkle salt, black pepper, garlic powder, and smoked paprika if using.
4 tablespoons olive oil, 1 teaspoon salt, 0.5 teaspoon black pepper, 1 teaspoon garlic powder, 0.5 teaspoon smoked paprika
Place steaks on a parchment-lined baking sheet spaced 1-2 inches apart to avoid steaming and ensure browning.
Bake at 425°F for 25-30 minutes. Flip steaks halfway through roasting for even color or skip flipping for extra crisp top side. Roast until edges are golden and centers pierce easily with a fork.
Let the steaks rest on the pan for 5 minutes after roasting. Drizzle with lemon juice and sprinkle with fresh parsley or thyme if desired. Serve immediately to maintain crisp edges.
1 tablespoon lemon juice, fresh parsley or thyme