I think a lot of the trouble here is with young mothers who do not know how to cook a meal. I worked with young single mums for years, and most of their meals consisted of frozen food or 'ready meals'. (The course I ran was not about nutrition, but on self-confidence, intending to get these young people back into work.) But I would set them challenges. One of them was to cook a meal for them and their children, from scratch. (Weekend 'homework'!) I was amazed at how thrilled they were, come Monday morning, at swapping their experiences (and recipes).
"I made a roast dinner - with chicken and vegetables!"
"I did spaghetti bolognese - it was great!"
They were all so pleased with themselves! (And rightly so!)
More education with food preparation and cooking is badly needed. These girls didn't learn anything from their own mothers.
My only worry here, is the expense of some fresh food. It's an fact that a shop-bought, frozen pie, is half the price of a home-made one! You can buy a freshly-made, family-sized apple crumble for £1. (Morrisons) It would cost you far more, to buy the cooking apples, flour, margarine, etc.
It's a weird change in circumstances over the years ... my mum used to knit all of our jumpers, cardigans, etc., because she couldn't afford to buy these items - but nowadays home-knitting is vastly more expensive than shop-bought knitwear.
But that we need food banks, here in the UK, is appalling!