Drain and rinse the canned chickpeas thoroughly in a colander to remove excess salt and canning liquid. Set aside.
Finely chop the red onion and soak it in cold water for about 10 minutes to soften and reduce pungency. Drain well.
Dice the bell peppers into small, colorful pieces and chop the fresh parsley finely. Slice the Kalamata olives if they aren't already sliced.
In a large mixing bowl, combine the rinsed chickpeas, diced bell peppers, softened red onion, chopped parsley, and sliced olives. Gently toss to distribute all ingredients evenly.
In a small bowl or jar, whisk together the freshly squeezed lemon juice, olive oil, salt, and black pepper until well combined. This creates a bright, tangy dressing.
Pour the dressing over the bean and vegetable mixture. Toss gently to coat all the ingredients thoroughly without mashing the beans.
Let the salad sit at room temperature for about 10 minutes to allow the flavors to meld, or refrigerate for up to 2 hours for an even more refreshing taste.
Give the salad one last gentle toss before serving. Taste and adjust seasoning if needed, adding more lemon juice or salt for brightness.
Serve the Mediterranean Bean Salad at room temperature or chilled, garnished with extra herbs if desired. Enjoy this fresh, crisp, and flavorful dish!