Preheat your oven to 180°C (160°C fan/Gas Mark 4) and remove any plastic wrapping from the Camembert, placing it in its wooden box or a small oven-proof dish.
Score the top rind of the Camembert in a criss-cross pattern, cutting just through the surface.
Insert the garlic slices and rosemary leaves into the cuts, drizzle with olive oil and season with freshly ground black pepper.
Place the Camembert on a baking tray and bake for 15–20 minutes, until the cheese is melted, bubbling and slightly golden on top.
Remove from the oven and serve immediately, straight from its dish, with crusty bread or crackers for dipping.