Sourdough Beef Dip

8 ounces cream cheese
1 cup sour cream
1 (4 ounce) package chipped beef, chopped
1/4 cup finely chopped green onion
Dash of Worcestershire sauce
2 tablespoons chopped green bell pepper
1 (8-inch) round loaf sourdough bread

Mix all ingredients together well except bread. Slice top of bread round and hollow out carefully, making sure there are no weak places in the bread shell. Fill shell with chipped beef mixture and put top back on. Wrap in foil and bake at 300 degrees F for 1 1/2 hours.