In A Large Skillet, Brown Chicken On Both Sides In Oil. Stir In The Tomatoes, Mushrooms, Green Pepper, Onion, Water, Italian Seasoning And Pepper. Bring To A Boil. Reduce Heat; Cover And Simmer For 10-15 Minutes Or Until Chicken Juices Run Clear. Remove Chicken And Keep Warm. Combine The Flour And Cold Water Until Smooth; Stir Into Tomato Mixture. Bring To A Boil; Cook And Stir For 2 Minutes Or Until Thickened. Serve Chicken And Sauce Over Rice.