2.Dust chicken in seasoned flour, shaking off excess. Heat oil and butter together in a flame-proof casserole dish on high. Brown chicken with bay leaves for 3-4 minutes. Transfer to a plate.
3.Saute onion and garlic in same pan for 1-2 minutes until tender. Stir harissa through, cooking for 1 minute. Pour in wine, simmering for 5 minutes, until reduced by half. Add stock, preserved lemon, olives, lemon and capers.
4.Return chicken and bay leaves to pan. Bake, covered, for 20 minutes. Uncover and bake for a further 10-15 minutes. Stir extra olives and capers through. Serve sprinkled with parsley.