On some trains, the French toast may be available, but only in one direction. Going west on the Cap & the CZ in 2011, only pancakes were available but I was told the French toast was available eastbound.
That appears to no longer be the case… looking at all of the routes on Amtrak website none of the routes have separate westbound and eastbound menus.
It also appears that there are only two different menus in use:
Version 1 is in use on most of the western trains (the California Zephyr, the Southwest Chief, the Coast Starlight, the Empire Builder, and Texas Eagle).
Version 2 is in use on most of the eastern trains (the City of New Orleans, the Crescent, the Sunset Limited, the Lake Shore Limited, the Silver Star and the Silver Meteor.)
The exceptions are the Cardinal (which has a simplified menu), the Capital Limited (has a variation of menu version 2 with an express lunch) and the Parlour Car on the Coast Starlight (which still has separate northbound and southbound menus).
I think this goes back to Amtrak's announcement earlier this year that they are working to reduce losses in the dining cars... They are raising prices for meals and reducing the number of menus in use (which I assume will make it cheaper for the catering contractor to supply the meals.)
The good news is that each menu features several of the "chef inspired" items that have gotten a lot of praise from customers. The bad news is if you're taking a round-trip on a train there's not a lot of variation (although there are still enough choices that you shouldn't have to order the same thing twice in a round-trip). Hopefully they will switch out the menus seasonally so frequent riders don't have the same choices for a whole year