Would she be better off if half the passengers had brought bags of McDonalds' 'meals' with them?
Surely the best option is to have simple microwavable food available. If you are hungry and want to eat then you pop up to a servery, take something out of the fridge, stick it in the microwave for the requisite time (easily done with, say, a barcode on the meal and barcode reader to operate the microwave) and bring it back on a tray to eat.
Then you clear up by taking the tray back and binning the remnants in the same way as you do at McDonalds.
That way you don't end up with the ovens stinking the cabin out, then everybody eating at once further stinking the cabin out, and then waiting ages after everyone has finished eating before your trays get cleared away.
But then I have never understood the need to eat on a plane. No flights are longer than 16 hours or so and that is easily manageable by a meal at the airport beforehand and a light snack on the plane. Why would anybody want to eat terrible food on the plane?