This just in from Istanbul. Mr Christie says:
Shakespeare mentions it more than once, along with "impotent parsley".
Here they either:
Pick off the leaves and mix them raw with drained yoghurt as a salad.
Stirfry some lamb mince with chopped onion till well browned, then add lots of washed purslane, salt and pepper and some water and cook slowly till lamb softens. Then add a handful of rice and leave to cook slowly till rice is done.
For previous post's recipes, go here.