

Get yourself a patch of soil, even if it’s just a couple of growbags, and grow potatoes. They’re like a magical self-replicating food. When you harvest them, keep some aside to plant later. One potato produces 5-10 potatoes easily, scale up for infinite potato glitch.
If you live in the UK or EU, you can even literally just plant ones you buy in the vegetable section in the supermarket. In the US, they often treat these with a growth inhibitor to extend the shelf-life, they won’t grow as easily.
Seed potatoes are guaranteed to produce healthy plants, but cost slightly more. You can buy them from garden centres or online.

Oh, yeah - I 100% agree. I was just trying to convey how ludicrously easy it is to grow your own. There’s no way you should base an entire survival strategy on just potatoes, despite how plausible Matt Damon made it seem.