Potatoes, corn, beans, squash, and eggs. (Do you "grow" eggs?)
So the first thing I would say is, garden if you can and if you enjoy it. Whether you garden right now or not, though, learn more about how to store and use the food that is grown locally.
[. . .] After incorporating potatoes into their repertoire, European populations thrived and expanded, erratic weather, Little Ice Age, or no.
... Grains and beans are the ultimate survival crops because they are so long-storing.
... We grow corn, the easiest of all grains to grow and process on a small scale. Corn is also, in areas where it grows well, by far the highest yielding of the grains. In addition, unlike the small grains, you can grow corn with nothing but a shovel or heavy hoe.