To roast the garlic, first slice the garlic head in half. Drizzle the exposed cloves with olive oil and season with salt and pepper. Wrap in foil and roast on a baking sheet at 400ºF (204ºC) for 40 minutes. Let cool, remove cloves from their skins and set aside.
Preheat oven to oven to 425ºF (220ºC).
In a medium-sized mixing bowl, stir together all ingredients until well combined. (Take care not to over mix, you want to see nice bits of roasted garlic throughout!) Transfer to a ½ litre oven-safe baking dish or a small skillet and top with more Parmesan cheese and crushed pepper.
Bake for 10-15 minutes until bubbling and golden. Next, move baking dish to top rack and turn oven to broil then broil for 2-3 minutes until browned, keeping a close eye so as not to over cook.
Remove from oven and place on a wire cooling rack to cool. Before serving, drizzle a little more olive oil across the top and garnish with extra thyme leaves and chili flakes. Surround with baguette or crostini and serve immediately while still warm.