Boil Potatoes In Broth And Salt For 12 Minutes. Drain But Reserve Broth. Saute Bacon Unti Crisp. Stir In Flour. Saute Until Flour Turns A Golden Brown. Slowly Add Reserved Broth. Bring To Boil And Simmer Until The Sauce Is Reduced To Half. Add Vinegar, Simmer For 10 Minutes. Add Potatoes And Heat Through. Season With Salt And Pepper And Serve.