Several carriers in addition to AS have aircraft that RON at MCI and then leave the next day on early morning trans-con departures to both coasts. In first class (on all that offer that cabin), a breakfast or continental breakfast is served on those routes. I would guess that the "breakfast" is double catered on the flight incoming from the night before and are left chilled/frozen (dry ice) in the carts on the plane overnight and might also consist of shelf stable ingredients, cereal, milk, fruit, pastries, etc. We have flown a very early morning DL service to LAX and the first class breakfast choices are typically cereal, shelf stable milk, pastry, banana, etc. or a warmed breakfast sandwich. We are on the early morning AS first class MCI-SAN for the first time in a few weeks and are expecting a cold breakfast option on the AS E175. So, if they can cater first class meals on aircraft that RON, they should be able to cater main cabin BOB menu options also.