Place the orzo in a large saucepan and add the turmeric. Cover with salted boiling water. Cook according to the packet instructions; this is usually 8-10 minutes.
Meanwhile make the dressing: To a small bowl, add the red wine vinegar, oregano. lemon juice, pickled veg vinegar, and water. Season to taste with salt and pepper. Set aside.
Remove the orzo from the heat and drain into a sieve. Run through cold water to cool it down and stop it from overcooking. Drain well.
Tip all the ingredients into a large bowl, check the seasoning and add some more salt and pepper if necessary. Mix well and serve sprinkled with some more chopped fresh parsley, if you wish.