bouillon

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...