Prepare the vegetables: Drain and rinse the chickpeas. Chop the cucumber, red bell pepper, red onion, cherry tomatoes, and greens into bite-sized pieces.Make the dressing: In a small bowl or jar, whisk together the olive oil, rice vinegar, stone-ground mustard, garlic powder, oregano, and honey until well combined and creamy.Combine the salad: Add the chickpeas, chopped vegetables, greens, and feta crumbles to a large bowl.Dress and toss: Pour the dressing over the salad and gently toss until everything is evenly coated.Chill and serve: Enjoy immediately or refrigerate for 30 minutes to allow the flavors to blend. Store leftovers in an airtight container in the refrigerator for up to 3–4 days.