We didn't have much money in the "70's. As the years rolled by, we had more and up to the day they died the joy of my Mum and Dad's life was to be able to take the whole family out to a restaurant 
We ate plain food. Mum was suspicious of freezers adn did not believe it was safe to freeze meat. So when we got a freezer, she didn't put a lot in it. When we got a pressure cooker she was scared of it and used to run from the kitchen. Everyone had to stand well back when she opened it, incase it exploded 
She didn't believe in convenience food but we did get a knocked off bulk vesta packs. Only my Dad ate them, as mum didn't think they were safe for children, we were sometimes allowed a crispy noodle
Cheese and milk were rationed as my dad needed them as he did a physical job. Thank god, we got milk in school.
Meat was eked out, on a Sunday roast, chicken wings were for children and then the chicken would last much longer.
We ate a lot of mince and offal.
Breakfast would be one weetabix. There would never be a choice.
Lunch, thin ham or paste sandwich. If at school we'd get a penguin biscuit as well
Dinner small piece of meat, boiled potatoes and seasonal veg.
It took Mum a long while to accept 'foreign foods'. We'd have pasta, with mince and gravy and mum thought it very exotic. 
If my Dad ever found money (he was good at this and used to keep his eyes glued to the l pavement. If it snowed and people had been sledging, he'd be very excited and comb the hills looking for dropped money)
He would bring the money home and throw it in the air for us kids to catch. We'd save it and buy a tin of salmon and if we had enough get feather blade steak which mum cooked in gravy.
My families life seemed to revolve around food.mum saved up stamps and with the milkman to get treat food at Xmas.
I remember a aunt treated us to McDonald's in the 70's when it had just opened. None of us liked it, and mum was sure 'rubbish' food would never catch on. By the time she was in her 70's she loved a McDonald's 
I remember when I got my first full-time job, in the 80's having enough money to take Mum to pizza hut, I was so proud that I could afford to buy the meal 
As a family now we have found our lives in the pandemic revolve aorund food yet again. We are very grateful to have so many different foods to choose from now