Marinated Beans
["1 can cut or whole green beans", "1 onion, cut in rings", "1 can mushrooms", "1/4 c. oil", "1/3 c. vinegar", "1/3 c. sugar"]
["Heat oil, vinegar and sugar until sugar dissolves.", "Marinate for several hours or overnight.", "Serves 4."]
["green beans", "onion", "mushrooms", "oil", "vinegar", "sugar"]