In a large mixing bowl, gently combine the chickpeas, black beans, and kidney beans.

Toss in the chopped bell peppers, red onion, and parsley.

In a separate small bowl, whisk together the olive oil, lemon juice, garlic powder, salt, and pepper.

Pour the dressing over the bean and veggie mixture, then toss until everything is well coated.

Cover the bowl and chill in the refrigerator for at least 30 minutes before serving.