Method:
1. Once your onion is chopped, place in a small pot of water for 5 minutes to let it soften.
2. Meanwhile, take the dressing ingredients and whisk together in a large bowl.
3. Drain the onion and add it to the dressing, along with the cucumber, parsley, oregano, and beans. Toss well to evenly cover with the dressing.
4. Cover and chill in the fridge for at least an hour, allowing the beans to marinate in the dressing.
5. Serve and enjoy!