Cut the top fourth off the loaf of bread; set top aside. Carefully hollow out bottom, leaving a 1/2-in. shell. Cube removed bread; set aside.
In a large bowl, combine the process cheese, sour cream and cream cheese. Stir in the ham, green onions, chilies and Worcestershire sauce. Spoon into bread shell; replace top. Wrap tightly in heavy-duty foil and place on a baking sheet. Bake at 350° for 60-70 minutes or until the filling is heated through.
Meanwhile, toss reserved bread cubes with oil and butter. Place on an ungreased 15x10x1-in. baking pan. Bake for 10-15 minutes or until golden brown, stirring occasionally.
Unwrap loaf and remove bread top; stir filling. Serve with vegetables and toasted bread cubes.
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