Method, information terminal, and non-transitory computer-readable recording medium

A method of controlling an information terminal of a user that communicates over a network with a first server that manages classification information indicating a type of vegetarianism to which the user belongs in correspondence with identification information that identifies the user, the method comprising:

• acquiring a restaurant ID corresponding to a restaurant and a seat ID indicating a seat of the user through a first operation screen displayed on a display of the information terminal of the user, wherein the first operation screen conforms to a common style designed by a matching app of the first server;
• acquiring, on a basis of the restaurant ID, menu information indicating one or more foods provided by the restaurant over a network from a second server associated with the restaurant corresponding to the restaurant ID;
• transmitting to the first server the identification information stored in the information terminal to acquire the classification information from the first server on a basis of the identification information;
• generating, at the information terminal, a personalized menu for the user corresponding to the classification information on a basis of the menu information and the classification information;
• displaying the personalized menu through a second operation screen for accepting an order of a food to be provided by the restaurant, wherein the second operation screen is customized according to a style designated by the restaurant;
• and
• transmitting from the information terminal to the second server i) food order information indicating the food selected from the personalized menu using the second operation screen and ii) the seat ID.