For example, it is nice if a lunch or dinner is prepared for them when they arrive. On the night of the performance they prefer to have a light snack of sandwiches etc. If you are cooking for them, just keep it simple. Noodles, rice, or potatoes, and beef or chicken, cooked simply, with vegetables, and then fruit for dessert, makes a great meal. Breakfast can be taken at the homes where they sleep, but they can gather for lunch and dinner.
Restaurants are another option, but a much more expensive one.
If you plan to take them out to eat, they like buffets, particularly Indian or Chinese food. Often Thai, and occasionally Chinese restaurants are willing to offer a meal for free to Buddhist nuns if you contact them in advance. A take-out meal can work very well after the show when it is late and no one has had time to cook. During the performance It would be greatly appreciated if refreshments are provided backstage during the performance, as the nuns' throats get dry. Water and fruit juice should be available.