My 100-year-old grandmother (who everyone calls granny)used to make these green beans when I was a child. She picked the beans fresh from her large backyard garden. Although I have never been a green bean fan, my husband is, and he loves this old time dish!
Trim bean; cut in half if extra long. Cook in boiling salted water until tender. Drain, then place in a warm serving dish.
Put onion and bacon in a small skillet and saute until bacon is crisp.
Whisk together eggs, vinegar and sugar in a small bowl, then whisk this mixture into skillet. Heat. When sauce is hot (don't overheat or you will 'scramble' the eggs!), pour over green beans; toss and serve.
*I know there is a concern nowadays about consuming uncooked eggs. Although the eggs in this dish are not fully cooked, they are heated until hot (perhaps 'pasturized'?) - as in Spaghetti Carbonara.