Only soybeans for the peasants!
Right - soybeans, pinto beans, peas - as member of the Legume family are high in fiber and easy to grow.
Some of the varieties can be trained to grow on a trellis of string, wire, fencing and can be grown vertically to conserve space especially in a small garden area.
Since they are high in fiber, it satisfies an appetite and makes you feel full; many diets use beans, corn, and rice to nutritiously satiate an appetite.
Same with curcubits, can be trellis trained- squash, cucumber, pumpkins, zucchini, gourds, etc.,etc.
And we haven't even gotten into root crops, interplanting crops, or companion planting, etc. in relation to food security.