Combine Chicken With Spices In Large Bowl. Stand Covered, For 1 Hour. Heat 2 Tablespoons Oil In A Large Pan. Cook Chicken Until Well Browned, But Not Cooked Through. Transfer To Larger Pan. Add Remaining Oil To Pan. Add Onion And Capsicum. Cook Over Low Heat For 5 Minutes, Stirring. Transfer To Large Pan With Chicken Pieces. Add Coriander And Stock, Lemon Rind, Juice And Olives. Simmer, Covered, For 40 Minutes, Until Tender And Liquid Has Reduced.Thicken Sauce With Cornflour If Desired. Serve Over Rice.