π€·π»ββοΈ Iβd say cut or break off as much as you know you will eat and preserve. Minus a little if that would mean the whole patch. Just make real sure you know what it is first.
Discussion
Hmmm I plucked off a small piece yesterday and I think you may be right that this one is "old," I am thinking because it grows in the open that it receives too much direct sunlight. It must be growing directly from the root of the oak tree beside it. I'll leave it be this year and maybe figure out a way to give it some shade π€£