PREHEAT oven to 400°F. Cut lengthwise slice from top of bread loaf. Remove center, leaving 1-inch-thick shell. Cut removed bread into bite-sized peices; set aside.
MIX remaining ingredients until well blended. Spoon into bread shell; cover with top of bread. Wrap in foil. Place on baking sheet.
BAKE 15 to 20 or until filling is heated through. Serve with the reserved bread pieces and assorted crackers.