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

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