As indicated if the OP is in economy they will be served the main meal approx. 30 mins to an hour into the flight, usually consisting a meat or veggie offering with a hard bread roll, piece of cake and drink. About an hour before landing a light snack is offered i.e. yogurt and bag of dried fruit plus hot or cold drink. The mini pizza was tasty although I remember that was served on the west bound TATL journey.