Maybe my granny was a lot older, she died in 1979 and I'm now in my 60's
Granny lived through the war and rationing so it was always scrimp and save, no waste
But even though the meats were cheaper, ( a hell of a lot of offal ) , meals were a small portion of meat, at least 3 veg ( boiled to death I grant you ) and either spuds or bread, even both
Granny made brilliant suet puddings - from steak and kidney to spotted dick :)
I do cook like granny, small meat portions , loads of veg - and a bowl of salad - and a simple carb - boiled spuds, jacket, or rice
In my granny's time, when she cared for us nippers, she had an open fire and gas lighting - I can remember the council coming to put the leccy in - and the iron got plugged into the light fitting as there was only one plug socket per a room put in :)
Granny;s way pf cooking, the cooking I did in my young days, was simple and plain. There was always a pudding - a suet or a crumble/pie or triffle - was to fill you
Ive worked as a professional cook for a lot of my life ( Im no chef ) and our mantra is we are here to feed not fatten, and I think that's what granny did
I do think the advice of cooking like granny means going back to basics, dont rely on processed foods, fill the plate with veg and have a dessert - stops the snacking
Ive watched/read somewhere, maybe the Glucose Queen??? , that eating a dessert straight after dinner is ok. Waiting till later, when boredom sets in, you get the sugar rush ( that the veg from the dinner stops ) and then the munchies and bad habits kick straight back in