Wild edibles are survival food for sure, but you can plant some cut and come again foods that will be your survival food right in the garden. Asparagus is one. I also have strawberries, blueberries , raspberries, gooseberries, Arctic Beauty kiwi fruit and grapes. Not a whole bunch of any one, but a pretty good mix of grown here fruits. There are also wild apple trees all over.
Also on that list are ; chives, garlic chives and bunching onions. Eaten fresh or cooked, leaves dried or used fresh in soups, stews, chopped into salad, eggs, etc.
Garlic chives have flat bladed leaves and smell and taste like garlic, no need to "run" to the store for a bulb of garlic. Pot some up for indoors in winter. Grow your own garlic for winter. I plant garlic in the fall here.
Regular chives have tubular leaves. Have onion like flavor and smell.
Bunching onions, Evergreen long white, I believe.
Dig and divide a serving size clump. Sort them big and small
Replant the small, start new rows, etc.
Snap off the flowers. This forces the onion to divide to survive and provide you with;
next years scallions.
Yes, it's a bit tedious, but hunger is far more so. I'm thankful to have the opportunity to live this close to the earth.