1.Cook Beef And Onion In 10-Inch Skillet Over Medium-High Heat Until Beef Is Well Browned, Stirring To Break Up Meat. Pour Off Fat. 2.Stir Soup, Ketchup And Worcestershire Into Skillet. Spoon Beef Mixture Into 12X8-Inch Shallow Baking Dish. Arrange Potatoes Around Edge Of Casserole. 3.Bake At 425 Degrees F For 25 Minutes Or Until Potatoes Are Done.