I invite anyone who dreams of self sufficiency to start by planting exactly 1 row of chard. I tried it once after it was mentioned in an article in a gardening magazine. The article recommended, if you want to produce literally all your vegetables yourself that you plant 8 rows of chard.

The article didn't lie, chard is ridiculously space efficient, easy for beginners and continuously produces leaves for harvest. I had maybe 6 big, healthy plants and was sick of chard just 1 week later. I just let them shoot and flower as they now owned that dirt.