Mix the flours in a bowl. Coat the fish with salt and leave it in its salted state for 15 minutes. First coat the fish in the flour mixture, then fry it in hot oil for 4 minutes on each side. Place it on a paper towel and let the excess oil drain.
For the parsley salad, mix sumac, olive oil, lemon juice and vinegar and prepare the salad dressing. Mix the greens in a bowl. Add the sauce to the greens and mix well. Serve with the turbot pan.