Place first 7 ingredients in a 6-qt. electric pressure cooker. Lock lid; close pressure-release valve. Adjust to pressure-cook on high for 15 minutes. Quick-release pressure., Select saute setting and adjust for low heat. Mix cornstarch and cream until smooth; stir into soup. Cook and stir until slightly thickened, 6-8 minutes. Stir in cheese and bacon. Heat through until cheese is melted. Press cancel. Sprinkle servings with parsley and, if desired, additional cheese and bacon.