Am of an age to remember parents who had been brought up through WWII rationing. My mother was an intelligent woman and a very conscientous cook. But a lot of her poor/rationed but nutritious meals would be totally unacceptable these days: stuffed hearts, anyone? Liver casserole? Breast (ie fat) of lamb? Scrag end/neck of lamb stew as (I believe) mentioned nostalgically by MPs ??
All, in my childhood, were very cheap and undoubtedly very nutritious. But - to me as a child (who soon became a vegetarian) - utterly inedible. On the other had, the fresh veg - grown in back garden and on an allotment - were delicious.
As a previous poster has said, all these kinds of meats (and much, much worse - remember Jamie Oliver's scrotum burgers?) have now been scooped up by the food industry and used to make cheap sausages, burgers etc. So - please NB MPs - forget the nostalgia; they are not an option.
What my mother did teach me was how to cook other things, as well: macaroni cheese, cauliflower cheese, a simple stew, cottage/shepherd's pie, celery/leeks au gratin, lentil soup etc etc. And of course baked potatoes, and bubble and squeak, and veg soup. But even these, if properly made , are not cheap nowadays. The cost of fuel then was trifling compared with today.
I admire Jack Monroe's original ethos (not so sure these days). But just compare her recipes with the government sponsored 'eatwell guide': assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/528193/Eatwell_guide_colour.pdf No way to they match that. Quite apart from anything else, the NHS eatwell guide recommends 'sustainable fish' ( a real luxury these days) and more expensive wholemeal pasta etc.
I really do wish - as others have suggested - that Mumsnet HQ would get MPs on Mumsnet to ask them how they would provide meals cheaply - no, just plain affordably - that fulfil the criteria in that guide.
One other point. "Food poverty" is a real issue - and not just in stereotypically deprived estates. I live in a really rural area. Our nearest supermarket is 40 miles away. So that's 80 miles round trip - an awful lot in petrol. Prices in the one local village shop are probably 100% higher for many items. And the local selection of affordable foods is very, very much smaller.
I'm fortunate; I can afford to buy wholefoods in bulk online. And I grow a lot of our own veg (though that's not cheap - compost has increased in price by over 100%, and seeds are also more expensive; there are also real problems - slugs, deer, rabbits to contend with - and it takes an awful lot of time which busy working parents simply will not have). But of course, of course, not everyone can 'grow their own'. Nor should they be expected to. As others have said, we are a wealthy nation. It's shocking that many of our children - through no fault of their parents - are not being properly fed.