Combine all the dressing ingredients in a bowl and whisk until evenly blended. If the dressing is thicker than you’d like, whisk in water by the tablespoonful to achieve the desired consistency. (Stored in an airtight container in the refrigerator, the dressing will keep for 1 week. Freeze for longer storage)
To make the chickpea salad:
Put the chickpeas into a large bowl and use a potato masher or a fork to mash them partially, leaving about half of the chickpeas whole.
Add the celery, apple, onion, pickle, dill, ½ cup of dressing and mix well. Season with pepper, then taste and adjust the seasonings. Add more dressing if desired.
Serve over mixed greens or spread over gluten free bread and top with tomato, avocado and sprouts.