I grew asparagus peas once, about 20 years ago. Pretty purlpe/red flowers. The pods were inconspicuous until a bit bigger than 'proper' size (the first I spotted were nearly 2" long) so were slightly tough. Once I had picked some, I got the knack of spotting them. Steam and eat with butter, or as a veg with roast etc. I gave them a very little support (a few bits of twig to keep them fractionally off the ground). These were sown direct, and at the time I lived in Orkney. I grew alternate rows of sugarpod and asparagus peas (very pretty when in flower), and the twigs I used for the plants to scramble up were blackcurrant prunings. It got embarrassing when I ended up with dozens of blackcurrant bushes....

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Flowers come in too many colours to see the world in black-and-white.