Cook bacon until crisp. Crumble, reserving 1/4 c. bacon fat. Saute onions in fat until soft. Add in and blend, flour, sugar, salt, pepper.
Add vinegar and water. Cook and stir until mixture thickens and bubbles. Add crisp bacon and sliced potatoes. Heat thoroughly, tossing gently. Sprinkle with snipped parsley. Makes 8 or 9 setvings.
This is traditionally served hot, but we serve at room temp, which makes it great for a picnic.