Hi Janet Super Sleuth.
I have tried the taste test and to be honest, it was practically tasteless but chewy. That seems to be the same for what I think are new and older leaves.
Unable to do any sleuthing work today because the weather up here in East Yorkshire is cold and wet. I passed by the allotments earlier, but nobody about.
Will try another day.
As to your "very long and frustrating road" I get what you mean, but I am quite enjoying our discussions with yourself and others who have joined my hunt for the truth, (beginning to sound a bit like The X-Files) and hopefully learning something about plants along the way.