Had a better look through my Favorited budget food pages. I've picked the simplest to make as I remember BF and not having the energy to make a cuppa.
Also found: Mini Pizza - 30p Pita breads for 6 (tesco value again) - tomato puree and a bit of cheese, ham, veg, whatever you've got leftover really. Puree can also be cheap, tomato sauce at a stretch. (DC can really get involved in this which makes it feel more fun rather than a money saving exercise)
Veggie hotpot - tinned peas, tinned carrotts, tinned mince and gravy, Slice potatoes, put on top and bake in oven. (I know tinned isn't ideal but any veg is better than no veg and we can't always afford fresh.)
I'd avoid biscuits, perhaps graham crackers with own brand value cheese spread instead? Some stores do their own brand with chives and faff in too which we love.
Baked bean "lasagne". Layer of beans, pasta, value pasta sauce, repeat, top with a little grated cheese.
Simple sponge. Just flour 2oz, eggs (2), sugar 2oz and marg 2oz, bit of value jam. Microwave and add the cheapy custard. You can microwave this with the golden syrup in too (Thank you to the MN'er who PM'd me this! We loved it)
I know puddings aren't a priority when you're struggling with food but I've found that having a cheap pudding a few nights a week makes the whole thing a lot more bearable. The flapjacks must have cost around 30p to make 6 good sized servings, we three had half last night with half of the 9p custard and will have the other half tonight. DS loves a pudding after his dinner and it feels like a treat for us all.
I'd stay away from Lidl, I went in the other day and it was all crap and tat, basics like the flour was so overpriced, also they don't seem to do an "own brand" so although some bits are cheaper than branded in supermarkets you don't really get as much as you can for your £. I've only been in the one though so maybe it varies store to store.