There is a module to help counting the number of Ticket Restaurant in order to collect several Ticket Restaurant at the same time.
You have to activate it from the Back Office > Your modules > Payment > activate the module Help for counting ticket restaurant
Then don't forget to synchronize as soon as you come back to your application.
If you want to cash your customer with a meal voucher, on the cashout menu, select the payment method > Ticket Restaurant and press Pay.
Then enter the amount of the Ticket Restaurant and the number of tickets at this amount and press validate.
Restaurant tickets appear as cashed in the bottom left corner of the screen.