Your vote on this answer has already been received
Means to order individual items from the menu, as opposed to ordering a set meal.
Means placing an order from the Restaurant Menu Card unlike a few restaurants which spread buffet for breakfast,lunch & dinner leaving no choice for the guest to eat anything else from whats available on the buffet table.
So,if u have a choice to eat what you want is 'a la carte' in short.
see link below for definintion
Silver Apple Restaurant
Find out more about the Silver Apple restaurant in Sligo Ireland.