Heat vinegar, sugar, water, oil, and celery seed. Rinse beans in cold water and place in a large salad bowl. Slice onion thinly, slice ... until ready to serve.
Drain the canned beans. In a large bowl ... jar combine vinegar, salad oil, sugar and celery seed; ... serving. Prepare Marinated Three Bean Salad as above, except ... 6 to 8 servings.