In a large mixing bowl, combine the drained chickpeas, diced cucumber, halved cherry tomatoes, and chopped red onion.
In a separate small bowl, prepare the tzatziki dressing by whisking together the Greek yogurt, minced garlic, chopped dill, lemon juice, olive oil, salt, and pepper until well combined.
Pour the tzatziki dressing over the chickpea and vegetable mixture, and gently toss to coat all the ingredients evenly.
Adjust seasoning with additional salt and pepper if desired, then chill the salad in the refrigerator for about 10 minutes before serving to let the flavors meld.
Serve chilled, garnished with extra dill if desired.
Feel free to add other vegetables like bell peppers or radishes for extra crunch and flavor.
This salad can be stored in the refrigerator for up to 2 days in an airtight container.
For a vegan version, substitute Greek yogurt with a plant-based yogurt alternative.