Expanding this slightly, back in December, we had the hot roast beef sandwich PVR-LAX and again on connecting flight LAX-SEA. Disappointed by lack of variety...
Yes, it's not just that the same food seems to be served on the outbound and return flights. There's an issue of lack of variety throughout the system.
Case in point: I had 6 flights from mid-October to early November. Of those 6, one was a breakfast flight and one was a cookie flight, so those don't count.
The other 4 all had the same food -- a half turkey sandwich and a slaw-like side. And they were completely different routes (ANC-SEA, SFO-PDX, ANC-ORD, SEA-SFO).
By the beginning of November I definitely didn't want to see another turkey sandwich for a very long time. How hard would it be to have some variety?