Red Valerian at the allotment

Red Valerian aka Centranthus ruber.  I was excited to read recently that this plant is edible - some say gorgeous flavour, others that the taste is bitter. I've just treated myself to Mark Diacono's latest tome The New Kitchen Garden (an excellent informative read, by the way) and he reckons that the leaves have a taste reminiscent of broad beans.  In my opinion that would make them rather yummy.

It's a perennial that is happy to self seed itself around and can be evergreen in a mild climate.  This one was photographed on a path near to my shared allotment and has come into flower in the last week. Butterflies are attracted to the flowers which might make them a good sacrificial plant to grow near brassicas but, if you want fresh greens for salads, etc, you'll have to cut the flowers off to stimulate new growth.  (Or perhaps have some for flowers and more for eating?)

Mark writes that while the new shoots are good to eat in spring and young leaves can be picked throughout the year, it's best to keep the plant watered in a dry spell to prevent leaves becoming bitter. As we've had some good rain in the past couple of days, I feel I'll be tempted to have a nibble next time I'm at the allotment and will definitely be encouraging a few of these plants to grow on the plot. I noticed that a few white ones seem to have made their way into the veg patch borders as well. Very serendipitous!

I'd be interested to know if anyone has tried (or would try) eating this plant
or do you prefer to leave it as a flower?  

Or perhaps are not fussed about valerian at all?