Preheat oven to 180°C (fan-forced).
Place the feta block in a small baking dish.
Scatter sliced chorizo around the feta.
Add rosemary sprigs and drizzle with olive oil.
Bake for ~20 minutes, or until the chorizo is sizzling and the feta is soft and lightly golden on the edges.
Serve warm with crusty bread rolls for dipping.