Combine flour, salt and pepper. Pound 2 tablespoons of the flour mixture into meat.
In a large skillet, add oil and brown meat on both sides over very high heat. Transfer meat to a 12x8x2 baking dish.
Stir remaining flour mixture into pan drippings in skillet. Stir in undrained tomatoes, onion and Worcestershire sauce. Cook and stir until thickened and bubbly. Cook and stir 1 to 2 minutes more. Pour over meat in baking dish.
Bake, uncovered, in a 350 degree Fahrenheit oven for 1 hour and 20 minutes or until meat is tender.