We had 5 children and a small income and were vegetarian.
We started a buying co-operative with some friends and bought all sorts of basic "cupboard" foods in bulk - rice, beans, oats, nuts, seeds, dried fruit etc.
We had a big allotment and kept bees
This meant we generally ate well - wholefoods and fresh vegetables but as the children grew of course it was cooking in huge quantities!
Just before a big delivery we ate quite a lot of what was left from the last one - millet porridge, miso crumpets, drop scones, lentils and rice, beany casseroles, dahl and various breads.
It was very exciting when the order arrived - a big lorry with sacks of grains, pulses, fruit and huge catering tubs of peanut butter... The children negotiated treats with our friends children - these might be apple juice, liquorice bars or fruit leathers, carob nuts or yogourt raisins. We would have a bit of a "party day" weighing out everyone's orders and stashing ours in the pantry alongside our pickles, beers, honey and so on.
We remember those days with a lot of warmth. They were very simple, but happy days.