Amtrak's dining-car portion sizes are pretty solid ... and I think Amtrak's California Zephyr and Coast Starlight have superior menus. The menus are so good that, if you're on a multi-day trip ...

I traveled five hours on the Amtrak Coast ... the dining service was only available to those with reservations in the sleeping car. Next time I ride the Coast Starlight, I'll stay in the sleeping ...