Preheat your oven to a cozy 400°F (204°C). Give your cauliflower head a good rinse and pat it completely dry. Carefully remove the outer leaves and trim the woody bottom stem so it sits flat, making sure the head stays together.
In a small bowl, whisk together the olive oil, crushed garlic, half of the grated Parmesan cheese (that's 2 tablespoons), dried basil, parsley, thyme, sea salt, and black pepper. This creates a delicious coating!
Place the prepared cauliflower head upside down (core facing up) in a 6-quart Dutch oven. Drizzle half of your lovely sauce over the core, letting it seep down. Then, flip the cauliflower right side up and drizzle the rest of the sauce all over. Use a pastry brush to spread it evenly, ensuring every part is covered.
Pop the lid onto your Dutch oven and bake for about 35 to 45 minutes, or until the cauliflower is wonderfully tender when pierced with a fork or knife.
Take off the lid and sprinkle the remaining 2 tablespoons of grated Parmesan cheese over the top. Transfer the Dutch oven under the broiler for about 5 minutes until the cheese turns a beautiful golden brown and gets deliciously crispy.
Carefully lift the whole roasted cauliflower onto a cutting board. Slice it into wedges or "steaks" and serve warm as a show-stopping side or a delightful main course!