it appears that the open-roasting area shall comply with the ordinary requirements for food-production sites. We are therefore really talking about having a factory-degree facility within a restaurant: required equipment includes for instance magnetic screening equipment, raw materials cleaning equipment, roaster with automatic temperature recorder, removal machine able to remove foreign material with density higher than 0.8g /ml, cooling plate, metal detector or X-ray quality detector automatic control able to detect the foreign bodies with diameter ≥ 2mm.