Egg-bread & scrambled-eggs ( with a multivitamin every other day ) can get you FAR, ultra-cheap ( if you ever need to get through a month on nearly-nothing ).

( obviously this isn't long-term, this is short-term-survival stuff )

add-in carrots, if you can.

A bit of broccoli makes a BIG difference in one's health.

Do what you can to get some omega-3's into you: our bodies can't make them, & if our bodies have to make omega-6's & omega-9's, apparently they just run mitochondria backwards, to do it.

Even a tablespoon of olive-oil / day will help your body keep functioning.