After thinking about it, when I had the breakfast buffet in the PPC last December, the scrambled eggs were in a plastic bag and put in the chaffing dish. I'm guessing that Amtrak makes their scrambled eggs by cooking the bag of processed eggs in a water bath. With the dining car still in place, I think it would not be impossible for one LSA to prep a batch of scrambled eggs for the the sleeping car passengers. If you look closely, you can tell that its not griddle cooked scrambled eggs.
Or serve hardboiled eggs for protein during breakfast. At many hotels that offer free breakfast, its usually scrambled, hardboiled or none.
Who does the "cooking" on the CONO?
Bigger picture here:
https://www.flickr.com/photos/115569327@N08/39121703934/in/album-72157689661494002/
Just maybe setup something like this one chaffing dish setup for breakfast along with the breads and jams. many of the budget hotels/motels that offer free breakfast I'm pretty sure do not cook but just reheat.