grain

so grains have lots of calories and store well,
they are meant to grow like the grass,
if you plant it correct, then all you will have to do is go harvest it,
it should need no water or attention at all while growing,
usually you just till up the ground, then scatter the seeds evenly and then rake them in to cover them.

here that means growing in the fall or in the spring as they are not a summer thing and can't grow without any water.
barley is likely the most durable gain, and there are several options for types,
I have seeds for a winter barley and will soon have a short season summer barley
the winter barley is planted in the fall and will get a few inches (like 6 inches) tall and then go dormant as winter hits,
the summer barley is planted in spring and has no option for dormancy

I tried the winter barley here 3 years ago and it did quite well,
so I will be planting that when it gets closer to fall
and will also be planting clover in much of the garden space, so the summer barley will get planted after the clover gets tilled in in early spring.

I am still allergic to the gluten in the grain, so I will be needing chickens to convert it into something I can eat.