I was interested to see so many comments on my post about eating amaranth leaves, especially Nita's suggestion of Orach as an alternative.  We may try Orach next year, but in the meantime I should report on the other summer green we experimented with in 2013 --- Malabar Spinach.  (Thanks for the seeds, Shannon!)

Malabar spinach is a lot like amaranth in that I think it could slip into an urban homestead's ornamental flower garden without raising eyebrows.  The flavor is superior to amaranth, in my opinion, being very spinachy and mild (acceptable even for salads).

The main problem with turning Malabar spinach into a main crop is that the plant is a vigorous vine, so we'd have to provide a trellis.  The one pictured here grew sideways until it was able to take over the stake I'd put in the ground beside our baby Issai kiwi, then headed straight up.

I was quite content with Swiss chard being our sole summer green until three years ago when blister beetles showed up.  Ever since, these night-time nibblers have turned my Swiss chard into a mess of holes and frass, with only the youngest leaves available for eating.  Maybe I should be focusing on blister beetle control, not looking for a replacement summer green?