In a skillet, cook beef, onion and green pepper over medium heat until meat is no longer pink; drain. Add the ketchup, mustard and salt; mix well. Transfer to a greased 2-qt. baking. Top with rice. In a bowl, combine the cheese, soup, milk and Worcestershire sauce. Pour over rice. Combine cornflakes and butter; sprinkle over the top. Bake, uncovered, at 375 degrees F for 35 minutes or until heated through.
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