Gather and prepare all ingredients.
In a large mixing bowl, combine the beans.
Add the cherry tomatoes, cucumber, bell pepper, and red onion.
Fold in the fresh parsley.
In a separate bowl or jar, whisk together olive oil, red wine vinegar, salt, and pepper.
Pour the dressing over the salad and toss gently.
Taste and adjust seasoning as needed.
Let the salad rest for at least 30 minutes before serving.