Cook bacon in a large Dutch oven over medium heat until crisp. Remove bacon from pan, reserving 1 teaspoon drippings in pan. Crumble bacon; set aside. Add onion to drippings in pan; cook 3 minutes, stirring frequently. Add bacon, salt, and remaining ingredients; bring to a boil. Reduce heat, and simmer, uncovered, 25 minutes or until beans are tender.
Long, often flat, large green beans are sold in most grocery stores as "pole beans." Because they are tougher and more fibrous than regular green beans, cooking pole bean takes longer than common green beans.