Marinated Green Bean Salad

2 (16 oz) cans green beans, drained
2 (16 oz) cans yellow waxed beans, drained
1 (16 oz) can black soy beans, drained (OPTIONAL)
1/2 small onion, chopped
1/2 green pepper, chopped
1/2 red pepper, chopped
5-10 black olives, chopped
1/3 c. cider vinegar
1/4 c. vegetable oil
2 T. Splenda
1 t. celery seed

Drain all beans and in a large bowl, combine with onions, peppers and olives. In a small bowl, combine the remaining ingredients and pour over the vegetables and toss. Refrigerate to marinate.