I was on AS1021 BUR-SEA on Saturday, seated in row 6.
It's been a long time since I've had an F Upgrade on this route, but as I've documented here in the past, F breakfast on this flight where the plane spends the night at Burbank has been, historically, a non-standard breakfast sandwich or breakfast burrito. Due to catering limitations, this food comes down the previous night and is stored in a cold box somewhere at the airport, then warmed up the next morning.
Comments have been made before that the standard "cold breakfast" of granola, etc would look better than this reheated thing and it was puzzling why AS is not choosing that options for this route.
As I was in 6, I did hear the F F/A introduce the breakfast, and they have transitioned to a cold breakfast of the standard granola offering for all F guests on this route.