GST- Restaurant Service (Franchisees)

Hello,

A restaurant is preparing and supplying cooked and semi cooked foods (including getting its raw materials for food preparation) to its franchisees (invoicing them as sales) and collecting Royalty for brand name usage. These franchisees are using brand name but are legal entites registered independent of this restaurant. The restaurant is treating these supplies of food to franchisees as Restaurant Service, Is it the right way to do so?

Or should this be treated as Supply of goods?