Take one bowl of last night's left overs.
(I had potato & sweet potato mash, carrot, broccoli, cauliflower....
you can use whatever you like......)
mash together with a fork, but not too thoroughly, you still want little chunks of vegetable.
Stir in one beaten egg, or two if you have a large amount of vegetables.
Heat a non-stick frypan, melt a little butter (or use oil if that's the way your boat floats).
I made just the one large fritatta this time, but 2-4 smaller ones works just as well, especially for kids.
This kept me going though the entire morning, including a very hectic four hour checkout stint.