German Style Potato Salad

My Aunt Chris gave me this German potato salad recipe and she is from Germany!

4 large Red potatoes, boiled until fork tender
up to 1/3 cup chicken stock
1 TBLS white or Champagne vinegar
1/2 TSP sugar
1/2 a large onion, chopped and sauteed
4 slices of bacon, cooked, chopped and 1 TBLS of the grease saved
1/2 TSP parsley
Salt & Pepper to taste

Directions:

Cook and cool the potatoes so they are just warm. Slice into med pieces. Slowly pour the chicken stock over them and toss until they are wet. Mix all ingredients and add to potatoes. Add more stock if still too dry.