put potatoes in medium saucepan and cover with cold water

bring to a boil, then reduce heat to medium and cook until fork tender, about fifteen minutes

meanwhile saute bacon in skillet over low heat until crispy, about 12 minutes

drain on paper towels

put eggs in small saucepan and cover with cold water

bring to boil, then remove fro heat, cover and let stand 6minutes

drain and run under cold water to cool...peel and chop

drain the potatoes..do not rinse,

transfer to a baking sheet

let cool 6 to 8 minutes

in small bowl combine vinegar, mayonnaise, mustard, scallions, red onion, sugar, salt, pepper to taste

transfer the potatoes to a large bowl and add bacon and hard cooked eggs

fold in mayonnaise mixture

serve at room temperature