Most evenings I receive a weary phone call to say that the Dr is off duty and he is en route home. ETA is followed by 'what can I eat?'. I can't normally get away with an omlette, he says he 'needs something with a little more body', I say 'they are delicious'.
Don't forget about eggs. An onion, chilli, garlic and courgette was all that was required boost the ultimate frugal supper. And it make him happy. (I think).