A quick Google search finds numerous reports of dinner being served after leaving LA.
Hakto told us that our dinner reservation was for 7:45 pm, so we
settled into our room.
Out of LA we rolled right on time to watch the darkening skies of
twilight, and we were enjoying dinner somewhere before San Bernardino.
Specials were Chicken Enchiladas, Stuffed Shells, and Trout.
Where I Dined: Tuesday dinner through Thursday breakfast Amtrak
Southwest Chief Diner (meals included in accommodation price): Tuesday
Dinner: 8 pm Trout w/vegetables, roll, salad, and dessert. A 1/2
bottle of Pinot Gris ($13).
The daily Southwest Chief leaves at 6:55PM [...] Since I wanted to
feel a bit like James Bond in Casino Royale (minus the incredibly
attractive Eva Green/Vesper Lund), I decided to splurge at the Dining
Car, which features classic American dishes in a sensibly appointed