All my last flights on them were in C, but three years ago I flew them in Y (FRA-IST + IST-AYT). Even in eco - and even for the 1 hour flight IST-AYT - GFMLs have been good, on par with what LH serves you for long haul C.

If I remember correctly, it was lamp with rice and prawns with rice + salads. Served on one of those Y-trays that look like "microwave dishes", but still good.