【明報專訊】You are thinking of starting a restaurant business. What would you say if someone tells you that you can start one without the need to have a dining area, the need to hire waitstaff, or the need to rent a space in expensive, high-foot-trafficked urban locations? What's more, you can even serve up to three times of meal orders as compared to a regular restaurant. Welcome to the world of ''ghost kitchens''.