i have to say i think UA's catering has gone down in the last few years, though in the current climate that shouldn't be a huge surprise. but the second serving lhr->jfk in economy is poor: a ham+cheese roll, a bag of crisps (chips) and a chocolate bar. fat, salt and sugar in abundance, but nary a vitamin in sight, and you can whistle for fibre
but having said that, the english tea serving in biz class on the same route is peachy!