Three Bean Salad With Celery

½ small onion, minced

2 stalks celery, chopped

1 (15 ounce) can kidney beans, drained and rinsed

1 (15 ounce) can garbanzo beans, drained and rinsed

1 (15 ounce) can cut green beans, drained and rinsed

½ cup olive oil

¼ cup white wine vinegar

¼ cup white sugar

½ teaspoon salt

½ teaspoon celery seed

¼ teaspoon ground black pepper

Combine onion, celery, kidney beans, garbanzo beans, and green beans in a mixing bowl. Add olive oil, vinegar, sugar, salt, celery seed, and black pepper to bean mixture; gently stir to coat. Cover bowl and chill completely 2 to 4 hours.