Step 1Preheat the oven to 190 °C/ 375 °F (conventional), or 170 C (340 F (fan assisted) and line a baking sheet with parchment paper. Place the cauliflower, onion, garlic, and thyme on the baking sheet and drizzle with 1/4 cup (60 ml) melted ghee. Season with the salt and pepper.