The food in Y isn't too bad on these flights. There's a full meal after departure, and a breakfast (pancakes, omelette -- not just a piece of banana bread) before arrival. They also serve a midflight snack such as a sandwich. No one is going to rave about the cuisine, but people shouldn't go hungry.
What is memorable about Y is being crammed into 10-across seating for close to 16 hours.