Cyndi's Four-Bean Salad

2 T finely diced onion
1/2 c white or cider vinegar
2 T Splenda granular
1/2 t salt
1/4 t pepper
1 14-15-oz. can cut green beans, drained
1 14-15-oz. can cut wax (yellow) beans, drained
1 14-15-oz. can red kidney beans, drained
1 14-15-oz. can garbanzo beans (chickpeas), drained

In medium bowl, whisk together the onion, vinegar, Splenda, salt, and pepper. Add beans. Stir to mix.