Here's about a third of our spinach crop.
This is from one eight-foot row from the garden in the far background. The other two thirds went into a fritatta that fed us for a couple of nights, and this is also about two meals worth. So, four meals. It is left as an exercise for the interested reader to figure out how many feet of spinach would need to be planted to end our household's dependence on imported spinach. (You can also figure in the chance of crop failure, as the row of lettuce right next to the spinach completely failed.) Chard's a much more productive crop in terms of meals per meter.