Originally Posted by A P Yu

This happens on other airlines too, the food, whatever its best-before date, has been out of proper chilled storage for too long and is therefore 'wasted' at the end (whether its in date or not).

You will see crews of other airlines cooking all the hot food left when an aircraft is returning to base, rather than cooking to order, as its going to be wasted anyway. This saves them some of the hassle of taking hot food orders prior to any service on those sectors