For the dressing:Combine all of the ingredients in a jar and shake vigorously to combine. Store in the refrigerator for up to one week.For the salad:Place the cucumbers, chickpeas, bell pepper, cherry tomatoes, olives and onion in a large bowl, stir to combine. Add dressing to taste and toss to coat. Stir in parsley. Sprinkle the feta cheese over the top and serve.