Serve as relish or salad
In a saucepan, combine 1/4 cup liquid from drained green beans with lemon juice, sugar, salt, pepper and tarragon. Heat to simmering.
Cool slightly; combine with salad oil and green onions.
Combine cooled liquid with drained oranges and green beans in shallow dish, mixing well.
Cover and refrigerate several hours or overnight.
Drain, saving dressing to pass in separate bowl or to use later as salad dressing.