I have a book full of stuff from that thread EachPeach! There was soooo much I haven't got around to trying it all yet!
Pasta bake's a good one if they'll eat pasta n sauce type things and cheese. Jacket spuds with beans, tuna mayo sarnies, fishcakes? made with tin of tuna? fish pie with tin of salmon or Asda sell a bag of about 6 frozen white fish fillets for about £1.66 n they do us 3 meals for me, oh and lo. That's if you shop at asda of course, I assume the other supermarkets would do something similar.
potato bake? similar to pasta but with spuds n cream.
stew . . . had for tea last night, loads left n very yummy. cost about 3 quid for 2 meals worth too & is so easy
Soups are dead easy and dead cheap n tasty too. My lo tries some with us when we eat, more inclined to eat something we're having sometimes.
home made biccys if you have chance are yummy and simple & I'm saving us a small fortune making rather than buying ours!
I'll keep thinking, there's loads more in book that people suggested & I've done a search for food budgeting which came up with loads of useful threads with ideas/recipes on a budget.
HTH.