Preheat the oven to 200°C / 400°F / Gas Mark 6.
Prepare the vegetables and cut into chunks. Put them into a roasting dish with the lemon and garlic. Season well and drizzle liberally with olive oil. Cook in the oven until the vegetables are tender, about 30-35 minutes.
Crumble the cheese and sprinkle amongst the vegetables. Serve warm with fresh bread.