Recipe(tried): German Potato Salad

Sheila, Here is my favorite German Potato Salad recipe. I've received many requests to bring this to pot-luck suppers.
5 slices bacon
3/4 cup onion, chopped
2 tbsp. flour
2/3 cup cider vinegar
1 1/3 cup water
1/4 cup sugar
1 tsp. salt
1/8 tsp. pepper
6 cups sliced cooked potatoes

Fry bacon in large skillet until crisp; remove and drain. Reserve 2 to 3 tbsp. drippings. Cook and stir onion in bacon drippings until tender. Stir in flour slowly; blend well. Add vinegar and water; cook, stirring until bubbly and slightly thick. Stir in sugar, salt and pepper; simmer 10 minutes. Crumble bacon. Carefully stir bacon and potatoes into hot mixture. Heat through, stirring lightly to coat potato slices. Serve warm. Serves 6-8