Marinated Potato Salad

6 fist-size potatoes, peeled & sliced very thin
6 to 7 slices of bacon, sautéed in 2 T. bacon grease with 1/2 c. olive oil
Put 3/4 cup wine vinegar in covered pot and bring potatoes to a boil. Barely simmer until done (30 minutes) and refrigerate for several hours. Add green peppers or red. Garnish with chopped parsley.