Luchow's German Potato Salad

Ingredients:

• 1 pound (3 medium) potatoes
• 6 slices bacon, diced
• 1 medium-size onion, diced
• 1/2 cup vinegar
• 1/2 cup stock or bouillon
• 1 tsp. salt
• 1/4 tsp. pepper
• 1 tsp. sugar
• 1 egg yolk, beaten
  

Directions:

1. Scrub potatoes; rinse. Boil in jackets; let cool. Peel and cut in 1/4-inch slices.
2. Cook bacon in hot pan until crisp. Add onion; stir and cook until transparent. Add vinegar, stock or bouillon, and seasonings.
3. Stir; let come to a boil. Stir in egg; remove from heat and pour over potatoes.