01 - Preheat oven to 425°F (220°C). Line a baking sheet with parchment paper.
02 - Remove the outer leaves from the cauliflower and trim the stem, keeping the core intact.
03 - Slice the cauliflower into 3/4-inch thick steaks. You'll get about 2–3 full steaks; the rest will break into florets — roast those too!
04 - Place the cauliflower steaks and florets onto the prepared baking sheet.
05 - Brush both sides with olive oil and sprinkle with garlic powder, smoked paprika, cumin, salt, and pepper.
06 - Roast for 15–20 minutes, flip carefully, and roast for another 10–15 minutes until tender and golden brown.
07 - Garnish with chopped parsley before serving.