Budget food

[Cloudane]

Instant noodles. I don't know if they're still 9p, probably more like 19p now, but still - alright with a side of similarly priced beans when you're poor.

Might as well just eat white flour. Don't forget that an important part of eating is to avoid malnourishment.

OP asks about budget food, not good food. In some situations "anything is better than nothing"
that said, you probably wouldn't eat exclusively that for every meal!