Crumble The Beef Into An Ungreased 2-1/2-Qt. Microwave-Safe Dish. Add Onion And Green Pepper; Mix Well. Cover And Microwave On High For 6 Minutes Or Until Meat Is No Longer Pink, Stirring Every 2 Minutes; Drain. Stir In The Beans, Tomatoes, Tomato Sauce, Water, Taco Seasoning And Chili Powder. Cover And Microwave On High For 5-6 Minutes Or Until Bubbly, Stirring Every 2 Minutes. Stir In Rice. Transfer To A Shallow 2-1/2-Qt. Microwave-Safe Dish Coated With Nonstick Cooking Spray. Cover And Let Stand For 6-8 Minutes Or Until Liquid Is Absorbed. Sprinkle With Cheese. Cover And Microwave On High For 1-2 Minutes Or Until Cheese Is Melted.