My Nana was a wonderful woman who brought up three children during the war (well, actually, two of them were evacuated as she lived in London) and she had some weird and wonderful ways with food. She grew all her own vegetables, well into her 80s, and could be quite eccentrically creative with her recipes. Some of her staples that I have never eaten anywhere other than at her house were:
watercress sandwiches (always on brown bread).
tinned mackerel sandwiches (always on white).
stuffed marrow - it was stuffed with minced beef and vegetables and roasted.
sausagemeat and tomato tart - like a sort of working class quiche 
strawberry jelly made with evaporated milk instead of water for a proper treat!